Wondering what's new in CSS3 and HTML5 that is bound to make your life easier, and maybe make you really ditch support for IE6 and maybe IE7? Read this article from Smashing Magazine for an excellent overview. It's hard to keep up with the changes that are becoming available in modern browsers and this article summarizes them all and provides links to learn more about each one.
Instead, we’re focusing on the specific techniques that you need to know to create modern CSS-based web pages of any style. For each technique or tool, we’ll indicate which of the five characteristics it helps meet. To keep this shorter than an encyclopedia, we’ll also just cover the basics of each technique, then point you to some useful, hand-picked resources to learn the full details.