Various Advice (3)

Use CSS comments

/* they are C-like comments */

That is, anything between /* and */ are ignored.

This is useful for notes on why you did things the way you did.

Use Validation services

The W3C’s CSS Validation Service : http://jigsaw.w3.org/css-validator/

Check the browser compatibilities for advanced CSS2 possibilities

http://westciv.com/style_master/academy/browser_support/index.html