Great site for tips...Gave me a few good suggestions I never thought of and/or never dealt with the scale that might need them. Also validated most of my current coding practices. In fact, there was only one practice they suggested against that I read that I am guilty of...too liberal use of <div> tags. I don't like using them, but didn't know of any better way to use them. Now I have a new resource.
Another great site, especially for those who don't know how to use and code XHTML/CSS (together or separately), is
http://www.HTMLDog.com. I still use it religiously for tag and attribute information because it is a simple, straight forward site for finding these details and showing how to use them if you get confused.