This hilarious series of tutorial spoofs by fictional Photoshop Pro Donnie Hoyle are actually quite informative.

The Best Links:

1. Fun with Photoshop Creator’s of the series Revealed
2. How To: Suck Less at Photoshop
3. You Suck at Photoshop #1: Distort, Warp, & Layer Effects
4. Fun With Photoshop
5. You Suck At Photoshop #10: Vanishing Point
6. You Suck At Photoshop #9: Curves
7. You Suck at Photoshop #8: 3D Layers
8. You Suck at Photoshop #7: Patch Tools and Levels
9. You Suck at Photoshop #6: Filter: Liquify
10. You Suck at Photoshop #5: Select Color Range
11. You Suck at Photoshop #4: Paths and Masks
12. You Suck at Photoshop, Hilarious Tutorials by Donnie Hoyle
13. You Suck at Photoshop #3: Clone Stamp and Manual Cloning
14. You Suck at Photoshop #2: Covering Your Mistakes