[kloncks]

There are a ton of books on the subject, most are fine.

Regarding graphic design, I would check out something like Pixel2Life (http://www.pixel2life.com) as it provides a lot of tutorials and step-by-step exercises.

Regarding the bigger issue of web design, my best advice to you would be to start following those in the industry that are proven leaders. Most big designers write blogs; follow them and read up on their tips. There are also a number of design magazine-like sources on the Internet, including sites like A List Apart, Drawar, and Smashing Magazine.

That would be a good mix of both contemplating theory and actual exercises.