The Power of Photoshop’s Refine Edge Tool
Why you should take photos in RAW.
Photoshop Tutorial – 4 easy steps.
Photography Cheat Sheet
Free color temperature photography cheat sheet: learn the right white balance setting for your shooting conditions
Photoshop Masking Techniques Everyone Should Know
Landscape Photography checklist: step by step recipe for how to get great shots.
Very thorough tutorial on Photoshop editing.
wish I did this in photography class
99 common photography problems (and how to solve them)