Advanced Photoshop Techniques for UI (by Edward Sanchez)
This video is teeming with handy tips for the Photoshop user. And while it may seem to cater towards those doing UI design, most if not all of the tips and tricks are valuable to anyone using the software.
Pay particular attention to the various ways in which to use layer and vector masks. I am always shocked to see artists who don’t take advantage of what I consider one of Photoshop’s most valuable core features.