Well, Noupe.com has some great selection of Photoshop tutorials, cheats,and lots more hacks.
Here’s a list of different tutorials/hacks you can check out:
Photoshop Textures
Photoshop Patterns
Photoshop Tutorials
Photoshop Brushes
Photoshop Actions
Photoshop Downloadable .PSD Files
Photoshop Cheat Sheets
...
