Anyone who has read my blog for a while will know that I like changing it around. I've tried alot of different CSS techniques over the past few years but when it comes to tried and tested layouts check out Glish.Layouts covered inclue:

• 3 columns, the holy grail
• 2 columns, ALA style
• 4 columns, all fluid
• 3 columns, all fluid
• static width and centered
• nested float

http://www.glish.com/css/