Does anyone have any special exercises you do when you're away from the Piano (or Guitar, Drum, etc.) to build Finger Strength, Finger Speed, or any other part of your hand? Just something you do when you're bored or just sitting idly with no instrument around?
For me, I discovered this little chinese-like ball that was sent to my brother in the mail. It's a ball made of yarn on the exterior and what I'm guessing are beads inside. It reminded me of a piece of advice someone gave me a while ago about squeezing the ball when you're bored or just sitting around in order to build up finger strength, wrist flexibility, and curve. I just found the ball today so I can't attest to any results just yet, but it seems like it should have SOME sort of positive impact.
Anywho, that's just something I started doing. Anyone else have any Piano-Free Exercises?