What do you think of my buddies invention:
http://www.tempoinmotion.com/
Helps with your swing:
About
T.i.M. is an innovative, easily downloadable system of rhythm and music that helps you find, and keep, your swing tempo. The right tempo is an elusive, flighty thing?it?s hard to find and just when you think you?ve found it, it?s gone. T.i.M. can help.
Each T.i.M. track has a series of beats that serve as cues for when to begin your upswing, start your downswing and contact the ball. The beats are paired with high-energy music that will help you find your groove when you?re on the range and beyond. It will make practice more fun and add some life to your game.
But most importantly, you?ll build steady tempo, which will help with muscle memory. Then you?ll find that you?re thinking about each swing less and less, because your body knows what to do.