For the most part these are tutorial sites, but some of them are other resources that will help you in your bid to become a Photoshop Master.Know of other cool Photoshop help sites online? Post them in a comment below!
Bitterpiphany's Graphic Design Tutorials
Photoshop CS Keyboard Shortcuts
Photoshop CS2 Keyboard Shortcuts
Photoshop CS3 Keyboard Shortcuts
Photoshop Tips and Tricks
Photoshop Tutorials (PSDTuts)
Photoshop Tutorials (TDA)
Photoshop Tutorials (Tutorial Nine)
Resource Masterlist (TDA)