For those of you employing or exploring standards-based designs using CSS (and this should be all of you!), check out this post on Lean XHTML and Precise CSS. Looks like a good method for organizing your stylesheets. CSS files can get pretty complex as your site develops, so having some organizational method will make life easier down the road. The article also reviews the benefits of keeping presentation code in CSS and out of your page markup.
(Via 456 Bereas Street blog.)