Revision 3 > Pixel Perfect > Learn Photoshop
Bert Monroy is amazing at Photoshop and likes to spread his knowledge via easy-to-digest video tutorials. On his website he displays his knack for creating photorealistic landscapes using a Wacom Tablet and the latest version of 'Shop.
I mainly use Illustrator at work (and for fun), so I could always use refreshers on Photoshop techniques. I owe it to my sister for getting me hooked on these tutorials taught in an easy-to-understand manner by a really mellow dude. He conveniently provides the vids in several different formats. I'd upload the videos to my iPod to watch on my commute.
So check out some tuts. See what you can whip up.