Pure fucking hilarity. Do yourself a favor and watch these.
Volume 1: Distort, Warp, & Layer Effects
Volume 2: Covering Your Mistakes
Volume 3: Clone Stamp and Manual Cloning
Volume 4: Paths and Masks
Volume 5: Select Color Range
Volume 6: Filter: Liquify
Volume 7: Patch Tools and Levels
Haha, I love Donny.