I found this great video via the comic tools blog. I have been working more than usual and the mouse is taking a toll on my hand. I find knitting breaks help, because it's a different sort of repetitive motion, but this video takes you through some great stretches to prevent tendinitis and other repetitive stress injuries to your hands. Good for anyone who sits at a computer, draws all day or knits.
I'm setting a timer for myself to get up and stretch every hour. I had been feeling a lot of pain in my wrist and forearm and these made it feel much better. It stretches muscles I didn't even know I had! :)