Chris Pearson has just written a dynamite post on how to use custom CSS with a WordPress theme.
It is especially important if you tweak your themes a lot, and the theme designer is highly active in upgrading themes with new features, and also helps if you tend to switch themes for various custom elements. A lot of plugins for instance ask you to add some CSS to your main CSS file, because they don’t inject it into your header automatically.
Read more on Custom CSS…
