CSS - good practices and optimisations

Smashing Magazine (always great info on CSS), has the following articles

• Improving code readability with CSS Styleguides
• CSS Specificity (say that quickly, 10 times in a row!)

Also, Antonio Lupetti has put together some great info on how to organise CSS, here and here.

There is also this older article that has good info/advice on a wide range of CSS-related matters.

If you have any info on any of the above, please enter it in this entry's comments

ps: Comments and/or links to this article are most welcome!