put both hands on a surface so their facing the same direction.Make sure your fingers are spread apart.Then lift up both thunbs at the same time.Do this ten times,then do it with the rest of your fingers.This helps your fingers stay strong so your accuracy while playing piano is better.It works for me.
hehe... i don't have problems with this. it's a simple exercise... useful if you're having trouble keeping your other fingers still. The hardest part is to get your ring finger to work properly. It has the least strength unless you lift up your hand and press the key. But practice makes perfect right?