I recently upgraded from CS2 to CS3 and as part of the package Adobe offered me a choice from three free items.  The one that I picked was a 30-day free access to a wonderful website of tutorials (not just Photoshop) called Lynda.com.  This site has some wonderful easy-to-follow tutorials, but for me the absolute highlights were the ones by Bert Monroy.   What a genius.  I recommend you Google his name and see his images.  They are fantastic and all created with just Photoshop