http://www.smashingmagazine.com/2008/08/18/7-principles-of-clean-and-optimized-css-code/
This is another post from SmachingMagazine. The principles are a pretty good standard ruleset.
#1 (shorthand CSS) is key. I opt for the least amount of whitespace as I can as some of the CSS files I write for larger sites still have a few hundred lines. This is without the IE 6 hacks, which are in a separate CSS file, which they recommend in #2. This allows your code to validate and also be condensed. Both good things.
Thank you Tony White.
Enjoy!



