I've done some use CSS- mostly for text font, color, size, etc. But I must create a site completely with CSS. Does anybody are conscious of worthwhile CSS lessons or any other assets?

Thanks!

I have found http://www.w3schools.com/css/ to be really useful

I loved Zen Garden after i was beginning out. Take a look at something like this.

I believe that Selectutorial and Floatutorial are very thorough.