This post was originally posted Nov 7, 2006 – I have added a screenshot as the original subject site is no longer online – it is still just as relevant today as it was over 3 years ago. In places I have added some additional commentary or expanded on original ideas.

References to PageRank should be looked on as synonymous with Google Juice & overall site authority, and not just green pixels in a toolbar, though that can be a good visual indicator at times.

How a Blogroll can kill your PageRank

I followed a link from Digg a few minutes a go, read the story, and as I frequently do on any site I visit, I snooped around a little.

I actually do exactly the same every time someone writes a blog post referring to me and pings my blog. It is the polite thing to do, and maybe I can add something to the conversation. It also allows me to relate any comment to the person who is writing about me, either positively or negatively. Everyone is entitled to opposing views. What is often important is why they have an opposing view, and it isn’t always obvious.

Now about the site in question:

1. I have only read half of one article there, so I don’t know much about the site contents
2. The reason I am linking through to the site is purely from an SEO point of view
3. This is a very common problem, very easy to make, and honestly not too hard to correct.

With that said, here is the site Kerry Fox Live (Archive.org link – the site seems to have been offline for 2 years.)

Initial Site Analysis

So the first thing I notice is that it is a PR3 site.

The internal categories are mainly PR2

The archives are mainly PR2

The individual post pages are generally PR1 or unranked

A large proportion of the content is duplicate syndicated content from services such as Associated Press, without any wrapping

But the site has been around for 16 months

You can make a splog, chuck duplicate content at it, and get a PR4 or PR5 after a few months.

So what is wrong with the site?

Take a look at the sidebar

At a guess (I am seriously not going to count them all), only 20% of the links on any given page point to an internal page. (yes that sidebar is on every page)
There are 2 blogrolls, one of which seems to be websites and blogs he likes, and the other is a whole load of press related sites… news sources.

Every single one of those links is a live external link leaking PageRank to other sites. Those other sites are not reciprocating in any way.

Now I am sure someone is likely to point out that those links provide a service for visitors, and maybe add a little authenticity to the site.

What visitors?

We are looking at a news site with an Alexa rank of close to 2M – not 2k, but 2M

Now there are times you want to sacrifice a little page rank to other sites, especially if they are reciprocating, sharing visitors, or in the case of my blog, I like visitors commenting and joing my “community”. You might also do it in a carefully controlled way from a mininet to one of your own sites.

Solutions

Get rid of the blogroll on all internal pages. It is giving away too much traffic to other sites, not to mention PageRank.

Add nofollow to all the blogroll links that are not reciprocating, or you don’t want to be overly friendly with. (Update August 2010 I would probably tend to use javascript in some way)

Increase internal linking to compensate for all the leakage.

How to Increase Internal Linking

• Recent posts – 10 links
• Top Posts – 10 links
• Recent Comments – 5 – 10 links
• Tagging + Tag Cloud – 50+ links
• There wouldn’t be a need for as much internal ball linking if there wasn’t so many external leaks. The site is gaining very few comments.
• Related posts – 5-10 links
• Related reviews – 5-10 links
• Glossary links

Emphasis should be placed on the links you wish visitors to traverse

External Linking

The site has 2 visible external links to the front page. I am not sure how many to internal pages, but even if it did have external links, any PR given would immediate leak.

Just syndicating one article will generate loads of backlinks, far in excess of what you can achieve with a single blog post (unless you have 100k+ readers). Based on my analysis of “A” list bloggers, their average blog post might normally generate around 10 backlinks (showing in Google).

(update August 2010: – whilst many of the bloggers I analysed in 2006 have 10x as many subscribers by RSS & email now, the number of links they receive, other than from splogs & social media probably hasn’t increased)

Conclusion

It is not rocket science, just simple maths.

If you have 100 external links on every page of your site, you need lot of internal links to retain some (hopefully most) of your PageRank, and it would certain help if those people you give a link to on your sidebar reciprocate in some manner.

(please note that includes me – don’t put a link in your blogroll to my site – sure I appreciate the links, but I would much prefer just an occasional mention in your blog)

If you can’t get a reciprocal link, use nofollow, (August 2010 – blocked external javascript), or stick them on their own seperate page so they don’t suck your own site dry.

And finally… this site structure plagues a huge proportion of blogs. Other blog owners who do not have this problem, quite likely don’t even realise why.

Further reading:

Revenge of the Mininet | 3rd Party content | Blog Comments | No Follow

Update: whilst I am still a fan of article marketing, I no longer recommend any service that doesn’t provide a way to have unique passwords for each distribution site.

Update: 28th August 2010 – this article doesn’t take into account changes to the way Google handles nofollow to combat PageRank sculpting.

Also WordPress has moved on a lot in 3 years since it was written – that does invalidate many of the concepts and linking structures presented, but the methods to achieve them might differ significantly.

Having previously written that I don’t typically undertake consulting work, I do look on any paid blog posts as a form of consultancy. In this particular case Tim from eMonetized decided to order a review of his blog, and we negotiated a little to ensure what you read is totally impartial and any links I choose to give are in an editorial context.
The negotiation itself was an interesting process, and I will be writing about that separately.

It should be noted that just because I mention improvements here, that doesn’t mean that Tim the site owner isn’t aware of something, and as also is almost always the case, I haven’t applied many SEO tweaks to this site yet.

That being said, some of the linking structures I talk about in the more geeky sections of this article I have never seen anyone talk about, and it is my belief that the resulting linking structure is highly unique, extremely powerful, whilst remaining flexible.

The Niche

Tim’s blog is one of a host of blogs looking to capitalize on terms such as make money, make money online and making money online, though it is clear that he is quite SEO aware, and from our communication this was made abundantly clear to me.
As an example he has a clear “money page” for promoting his primary affiliate programs using a URL “Making Money Online“.

One of the hardest problems with the “make money” niche is that most of the related search terms that are provided if you use the Google Keyword Suggest tool are very much “long tail” terms, many of which receive only mediocre traffic. Many of the more specific terms receive minimal search volume unless it is related to a specific product, or product launch.

The direction Tim seems to be taking is to target content in the topical community such as Adsense, Adwords and Affiliate Marketing, rather than writing a series of posts based on what Google regard as related topics, such as “How To Make Money [Insert Blank]“, “Making Money [Insert Blank]”

This suggests to me that we might look to optimize the site such that the categories perform well as landing pages, though I believe it is possible to significantly improve site structure to give the site an unfair advantage on a few competitive terms.

SEO Strategy

It is clear that Tim is thinking about his SEO Strategy, and is off to a good start. Here are some of the things he is currently doing that I can see just browsing around the site.

• URLs / Slugs – Tim is using optimized page slugs for every post – there are some plugins that can achieve this automatically, so that just keywords are used without grammatical filler, though I think he is probably doing this manually. URLs are not a major ranking factor, in fact some SEOs would say it is very minor. URLs are a clickthrough factor, and there are limitations for URL length.
• Robots.txt – A lot of things are being blocked off in his Robots.txt file, including date based archives, paged content, images and author pages. He is also blocking off tags – I am not going to dispute that decision, it is something to test and track. There is overlap between categories and tags – it is possible to make that work ok by including additional content and different layouts, and with some SEO linking structures you would block both, others you would enhance both. One good thing he is doing is blocking all his /go/ affiliate links.
  Important:- Robots.txt is a bandaid as it can create hanging or dangling pages.
• Sitemap – he has a clear sitemap, though I worry a little about multi-page sitemaps. If they go multi-page, it is better to make them more of a topical tree, than links between pages… breadcrumb navigation or not. Then it is effectively creating a category listing.
• htaccess – either htaccess or a plugin is being used to ensure all URLs are www
• Related posts – related posts (probably using Wasabi) are being used to increase the internal linking to related content, good for both search engines and human page views.
• Nofollow – Nofollow is being applied to a few links that shouldn’t pass pagerank, such as to forms for email subscription and Technorati favorites
• Excerpts – pages that could potentially be looked on by the search engine spiders as duplicate content are being displayed using the_excerpt() rather than the_content()
• Titles – these seem to be OK, maybe already using SEO Title Tag plugin or similar

Quick Improvements

• WordPress 2.2 – This really is a necessary upgrade for security reasons.
• htaccess trailing slashes – Canonicalization isn’t only to do with “www” or “no www” choices. If you have chosen to use www, then just include the second half of the code from my post about WordPress htaccess to cover the trailing slashes.
• Home / Page Links – some you want to receive lots of juice, others probably shouldn’t receive any at all, and some you might only want a followed link on your home page. The best option is probably to create these links manually, and have one set that is used on your home page, and another for everywhere else.



• Feeds – I find having related posts in feeds very important from an SEO perspective when people syndicate your content with or without permission – they are also useful for readers, though I wish more readers used them.If tag pages are being indexed, it is potentially good to have tags in your feed as well.

  Tim offers a full content feed that is worth subscribing to, though only half of the subscribers will currently be registered by Feedburner. Those that use the auto-discovery link are not currently being redirected to Feedburner. Fix this with the Feedburner Redirect Plugin, now called Feedsmith or think about one of Feedburner’s pro solutions.

• Sociable Plugin – it creates search engine followable links to submission forms on the various bookmarking sites – switch to using a search engine friendly version of sociable.
• Meta Description and Keywords – there are a host of plugins available to do this, though I haven’t actually found one that I regard as ideal. Generally a little trial and error is required, as there can be a few incompatibilities depending on how other plugins interact with your content.
• 404 Error Page – currently this results in the homepage – it might be better to use one of the many 404 plugins available to give some related content to what resulted in an error.

More Time Consuming or Technical

• Stop Using Widgets – until it becomes easy to control which widgets appear on which page, with and without nofollow, if you want to highly optimize your site, it is much easier without using WordPress Widgets. There is an alternative shipped with the K2 theme, sidebar modules (SBM), but I have had difficulty making it work with WordPress 2.2 and other themes
• Multiple Templates & SidebarsYou can do a lot using WordPress logic, but it starts to become very complicated if you use the same template file and sidebar everywhere.
  Single pages are probably the most likely to hit high server loads, so I always use a WordPress theme which has a single.php – in my current one the sidebar is included as part of the single.php file, but it can also be done using a php include for something like sidebar2.php 
• Sitewide Links – only give them when there is a specific reason, even for internal navigation elements. As an example we will look at category listings, but the same applies for all sidebar content.

Category listings

For a home page listing, and category pages, it is normal to list all categories

<br /><?php if ( is_home() || is_category() ) { ?><br /><li id="categories"><br /> <h3>Categories</h3><br /> <ul><br /><?php wp_list_cats('sort_column=name&hierarchical=1') ?><br /> </ul><br /> </li><br /><?php } ?><br />

For single pages, if you are aiming for a classic tree structure, it is better to list specific categories.

<br /><ul><br /> <li><?php the_category('</li><li>') ?></li><br /></ul><br />

You probably already have links to specific category pages at the bottom of each post, thus maybe sidebar category links should be nofollowed using the add link attribute plugin.

<br /><ul><br /><li><?php add_link_attr('the_category', '</li><li>',
'rel="nofollow"'); ?></li><br /></ul><br />

You could also aim for a “halfway house” and include only your most targeted primary categories on every page in the sidebar, other than on your homepage which would include all categories.

That doesn’t necessarily mean you would have followed links in the sidebar on your front page at all, other than to possibly your sitemap.

• Nofollow From Home – if Google and other search engines are being guided to your sitemap, and you value all your content equally, it makes perfect sense to have nofollow on any links within content that appear on your home page with the nofollow from home plugin This should be avoided if you don’t offer full content feeds because Technorati would probably have great difficulty with many of the links as they typically use the RSS feed, or your homepage to determine linkage.
  Update: I have now developed an advanced version of this plugin which adds nofollow to the links on all pages other than your permalink pages
• Headings – Correct use of headings for SEO and general semantic improvements – as an example for Tim’s current theme, there is no H1 heading, and the author information is given a heading tag. In addition the heading in WordPress sidebars have always been given on most themes the same level of semantic purpose as sub-headings within content, which isn’t ideal for SEO purposes.

Advanced SEO & Presentation

To really optimize WordPress effectively, you need to start looking at optimizing the layout of the homepage, category pages, and tag pages, not just for SEO, but for presentation. Most wordpress blogs by default use index.php for homepage and category pages, and the same is true for tag pages with UTW if you don’t define a tag.php file.

You can either create custom templates, or add lots of complicated WordPress logic.

WordPress handles templates in the following priority

1. category-6.php
2. category.php
3. archive.php
4. index.php

In many SEO linking structures, the categories are intended to be landing pages for their topic, and to concentrate more google juice than individual pages.
There are also linking structures that might be equally viable in many circumstances where categories pass Google juice in a single direction, either from the home page to single pages which subsequently pass juice only to the home page, or the home page passes juice to single pages through a sitemap, and the juice flows back up to the home page through the categories.

If category pages were intended to pass Google juice in 2 directions as would be normal for a simple tree structure, then you would need something like the following:-

Ultimately however if you have ever spent any time playing around with a pagerank calculator, linking structures that feature a spiral, channelling juice around in a circle using one-way links tend to perform better than sites using 2 way links.

There are a number of plugins that try to create “pretty” excerpts for duplicate content pages that contain excerpts, or you can manually create them with HTML and even thumbnail pictures.
One of the best new options seems to be the Excerpts Editor though I haven’t tested it yet.

This should be mixed with custom query string (Note: New Version that includes support for UTW) which would allow you to have a different number of posts on your front page compared to various archive pages. Ideally when siloing you would want to list all pages under a particular category or tag page. The easier alternative is the siloing plugin.

Beyond Geeky SEO

Revenge of the Mininet by Michael Campbell and the bonus Dynamic Linking Ebook by Leslie Rohde have been for many years one of the most advanced tutorials on geeky linking structures to maximise pagerank.

To get any real benefit from this geeky section you really have to read those ebooks, they are available free for those who sign up to Michaels mailing list, and are well worth investing an evening reading, and maybe reading a couple of times more to fully understand how pagerank and linking structures can really help you.

One of my favourite structures was the spider circle

Note: In the following content I frequently link through to Web Workshop and their Pagerank Calculator. The links are nofollowed because I am linking through to form data

Here is the Spider Circle mapped out in the calculator.

The big problem with this linking structure, if you look at blogging in particular, is as soon as you add any external links to the content pages, the benefits turn into a huge hazzard, because this structure is also one of the best for sacrificial sites. Totally forget anything like this if you have removed nofollow from your comments.
Even disproportionate linking to your content from other sites isn’t going to rescue it. In that example there is 4x as many incoming links as those outgoing. The numbers are all relative, and don’t represent toolbar pagerank, but the benefit of good linking structure is lost.

One of the best linking structures for a website that was discussed was called “Stacked Pyramids with Tunnels Home”

The layout was something like this:-

There are a lot more unique pages involved, so you can’t directly compare this with the previous diagram. Here is how this structure looks like in a calculation.
What happens when we add some incoming and outgoing links? Well it doesn’t go quite as pear-shaped as the spider but still stuggles with a more realistic ratio of incoming to outgoing links.

I have played around with most of the other examples within Revenge of the Mininet over the last few months trying to create a “defensible linking structure”, something that performs well under severe abuse, with multiple external links on every page of unique content, as might happen with a blogger generous with link love, or using Dofollow.

In the end I opted for massive ball linking using tagging, with the structure totally organic, but helping Google juice flow away from pages which were gaining a lot of links, and likewise probably a lot of comments as well, so that the juice could enrich other content.
I knew this wasn’t optimal

I also wanted to come up with a better benefit from using internal tagging than my previously mentioned 4.9 > 3.6 ? (Titles > Duplicate Content)

Introducing “Sandcastles With Perimeter Wall”

I have no idea how this will work based upon all the other 100+ or 200+ ranking factors for web pages, but as far as pagerank is concerned it seems to be an extremely defensible structure, in fact you can abuse the hell out of it, and it performs well.

Sandcastle Pagerank Calculation

I should note that in that calculation there are still only 9 pages of 100% unique original article content.
The secret lies in having created additional unique pages that in themselves are useful for humans and even linkworthy, but those pages only link through to the homepage and gather up link juice that might have passed excessively through external links on a popular post.

Here is what it looks link if it is heavily abused like the previous example with lots of external links, and only a few incoming links.

Here is what is happening….

I first of all started off with category siloing, one way links passing juice from the homepage through the categories, and down to the content.
In addition I added a sitemap link from the homepage, that has one way links also through to the content. In addition, if it is being abused on a blog, it performs better with links from the sitemap to the homepage and categories from the sitemap, though the differences are small.

Juice flows from the permalink pages through one way links to one of 5 tag pages for each post, assigned at random in the model, and then again one way link to the homepage.

If you throw in a couple of related posts, even with the external links it performs very well, especially for the home page.

Here is a visualisation of Sandcastles With Perimeter Wall

As I have stated before, I visualise linking structures in 3D, and this one could be much easier visualised on a 3D checkers board (I used to have one as a kid), but effectively it is built of 3 different layers.

I haven’t quite worked out the best way to handle single pages, maybe it would be necessary to add yet another tree link structure for those.

I haven’t got any sites using this new structure yet, but it is something I will be aiming for on a number of sites soon, including this one.

Creating This Linking Structure With WordPress

It is possible (though a little complicated) with what I have listed above, but I will try to have a modified theme available soon, aptly named the “Sandcastle” theme, based upon Sandbox (so it can be easily skinned)

Linkworthy Content

Whilst a good linking structure might give you 5x to 10x the benefit of any incoming links to rank a few specific pages, you still need to have content people will link to.

For me one of the highlights of Tim’s blog are already the case studies.

Whilst I haven’t invested money in Stumbleupon advertising, the conversion rate to subscribers he achieved with $100 worth of visits seems about the same as with free traffic. From what I have seen so far, Top Stumblers are mainly interested in cool pictures and humor as one of Tim’s commenters has already pointed out, and are very much anti-commercial, especially anything to do with StumbleUpon optimization. It is very easy to get post content buried, in fact easier than Digg in many ways.
A post on optimizing for another social news site such as Digg however might not get buried by the sacred protectors of the SU realm, and is more likely to continue bringing traffic (that is what I have experienced anyway). I have also found support a little lacking.

Tim has also been looking at Adsense Arbitrage – I think the safe bet is to convert those low PPC landing pages into affiliate or other forms of CPA income, if the cost of clicks is still quite low.

Tim is a creative thinker, after all he was the one who started using Adsense site targeting on John Chows blog, which gave John the idea of using it on Problogger.net

Whilst Tim’s blog is only a couple of months old, I expect great things and lots of in-depth experimentation in traffic and monetization, so don’t forget to sign up to his RSS feed.

Update – Nofollow Those Dupes Plugin

I have now released a plugin that can be used to help in creating the “Sandcastles With Perimeter Wall linking structure called Nofollow Those Dupes

It is actually of benefit on any blog that doesn’t block duplicate content pages from being indexed.

As I have discussed in the past, when discussing blog internal linking, for this blog I am doing “massive ball linking”.

Links come into the blog from various places and to specific content. By using tagging and related posts on each page (maybe a few too many now), whatever pagerank, trust and relevance that a page is given, get passed onto other relevant content.

It also gets passed onto people who leave comments or trackback. When you link to me from your blog posts, the juice flows back – sometimes more, sometimes less, but it is all relevant links – just what the web is all about.

I suppose you could look on this as a “organic garden” approach. Just let things grow wild, and only interfere if something needs drastic change.

I haven’t been overly worried about the multiple forms of duplicate content that are typical on a WordPress blog.

Exactly Why I Don’t Worry About Duplicate Content

First of all I discussed this a little not so long ago, in particular about duplicate content and supplemental results.

Matt Cutts isn’t worried about honest duplicate content

Proof – Matt Really isn’t worried

First of all lets take at look at Matt’s robots.txt file

User-agent: *
Allow:

Then you can look at the metadata on all Matts duplicate content pages

Category archives – I am going to link to his seo glossary, I am sure it doesn’t get many links.
Date Archives
Sequential pages – lets go back in time a few pages

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Matt Cutts: Gadgets, Google, and SEO &raquo; Movies/Videos</title>
<meta name="generator" content="WordPress 2.0.7" /> <!-- leave this for stats -->
<meta name="robots" content="noodp">

Basically he lets the search engines work out what is going on.

There are simple plugins out there to prevent these pages being indexed and followed in various ways, but Matt Cutts doesn’t worry about it.

The Wayback Machine

Yep, more duplicate content – Matt doesn’t block them

Matt Doesn’t even block the login page to his WordPress installation – that same page appears over 2 million times on the web.

Let it Flow

OMG I am wasting all that Google Juice that I worked so hard for!

Or maybe not…

Google Juice is liquid… it flows, it you give it a direction to flow in.

Whilst you may give a page with duplicate content some juice, that juice flows back out to other pages. Just because that page might end up in the supplemental results, doesn’t mean the Google juice is being wasted.

Some blog designs unfortunately place too much emphasis on the most current content. They don’t use tags, their date archives are accessed by a silly calendar widget on the front page, and they don’t have any other routes for pagerank to flow.

Structured Linking

It is possible to use only a very structured linking system for a blog, but it is important to think about relevance. In Revenge of the Mininet there are some great linking structures defined. They would be ideal for highly “niched” sites.

Many blogs, including this one, cover a wide multitude of subjects. A carefully constructed linking structure would be much harder to define and you might lose the benefit of giving relevance to specific pages.

Structured Relevance?

Some duplicate content pages give great, maybe even enhanced relevance to content.
Date archives in many blog designs are not very helpful. If date archives and previous pages are used as the primary navigation to previous content, and path for search engines to take, you really aren’t giving your content any justice or longevity.

Content Longevity

Lets look at some of my internal pages for longevity

How a Blogroll can kill your Pagerank – 2 month old post, linked to a few times in posts, but it appears a lot on pages due to tagging and using related posts – currently PR4

NoFollow and Pink Boxes – also PR4

Some posts on UTW Tips – both PR3

Ultimate Tag Warrior SEO Tricks (pt 1)
UTW – Tagging SEO Tricks (pt 2)

From browsing around, I have discovered that the Google Toolbar Pagerank isn’t completely comprehensive, as I have posts that should have PR4 that don’t. One of them was my highest ranking page in November and December.

It was hard to find a post that hadn’t been later referred to in a more recent post but this is a good example:-

No NoFollow & No-Nofollow.com

That post is again PR3, and didn’t receive any specific direct love from outside links or internal links in posts. It did benefit from tagging, and related posts.

This time around I didn’t tag and categorize my old content from my blogspot domain. Almost all of that content didn’t receive much pagerank love unless it had been linked to directly.
I am going to see if for the next update it can be revitalized.

How much of your old content retains visible pagerank?

It is actually still difficult to compare, because so many pages still haven’t received pagerank they probably deserve. Even Matt has some pages that are linked to from PR6 categories that show a toolbar pagerank of zero such as http://www.mattcutts.com/blog/starving-to-death-review/

I would link to it directly with a live link, but I don’t want to ruin the example

For one of Matts posts that one probably received a lot less inbound links

Yes that is a Yahoo link – wouldn’t it be nice to have a “-all” flag on Google searches to list everything below Google’s threshold as well, even if it is just an aid for webmasters to find splogs.

Conclusion

Matt is a busy man, maybe he hasn’t had time to optimize and avoid all these duplicate content issues but I really believe it is nothing to worry about, and Matt might just be demonstrating this with his own blog.

You can aim for a more focused structure on a blog, using various forms of dynamic linking but it is not something easy to achieve yet with any platform.

Bookmark or Subscribe to this post

Download Revenge of the Mininet for free (It is honestly worth signing up to Michaels list)

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Log into the Leslie Rohde Dynamic Linking Bonus (for some reason the site asks for the password twice, you didn’t make a mistake, just use the username and password twice)
Read Dynamic Linking through at least twice

Come back to reading this post…

Stop Reading if you haven’t done all of the above!

So a blog is generally a ball linking structure. (if you read the books you would know about this term)
But lets think about other sites, and how you can cheat a little when using 3rd party articles (duplicate content).

Using 3rd party articles, you are forced to have an external link.

There are 2 ways of doing this, and it is not really discussed in either ebook.

1. Limit the amount of PR that is given to the pages, thus you might have the link to the articles sitemap on your main sitemap.

This strategy is ok if you mainly want the articles to sacrifice PR, but they still have quite a PR leak.

2. Use ball linking from any 3rd party article page, minimising the value of any external link from the page

Thus have lots of links to related content that doesn’t have PR leaks, minimising the amount of PR that is “wasted”.

Apply it back to blogs

If you use “no follow” for all your comments (or not allow comments), and “no follow” on all external links, then you can do some great optimization, but would probably be unpopular. It would still be quite complicated to achieve various “spider” or “pyramid” solutions.
If you use “no follow” in comments, and not for external links, and optimize your site carefully, you might end up giving too much PR away to the other site.

If you don’t use “no follow” at all, that is a lot of leaks. PR however flows equally, thus if a page has a lot of comments on it, and has a lot of links, you need to have as many leaks to your own pages as possible. It is better to give PR to pages without too many leaks.

Even using a Blog as a CMS with no comments – you are going to need at the very least lots of special custom templates.

Short term solution

Popular blogs are better off having at least a partial ball structure, with so many internal links on a page that it doesn’t matter about the external links.

Think about your average number of comments and external links per post. Then decide how much PR you want to give away. If you have 10 external links on your page and want to give away only 10% of the page PR to them, you need to have 100 internal links of your own on the page.
Tagging and categories can help a lot if used correctly. Blogrolls on every page can be extremely bad. It is much better to “share the juice” by posting about your friends from an SEO point of view, than having them on your sitewide blogroll all the time.

The implementations for widgets for any theme I have seen so far really don’t help you very much.
PLR (private label rights) is the best content for sacrificial mininet sites, as it is easy to sacrifice with no 3rd party outbound links.

Post your most important content as pages rather than posts using modified templates.

Long term solution

;)

Update August 2010

For the last year Google have been suggesting PageRank evaporates from Nofollow links – so you will just have to use javascript, or test what Google claim.