The main idea behind CSS-based layouts is offering more flexibility and enhancing the visual experience of visitors. Some important tips and related key-factors can help to learn basics and keep essential techniques in mind. And this is what this article is all about. Finding the perfect Layout that have Total Flexibility, Equal Height Columns and just works fine.

Here's the actual article, which in itself is an aggregation from other sources:
http://www.noupe.com/css/css-layouts...practices.html