Set up seven tees or coins six inches apart. Place the ball at the middle tee or coin. Hit putts swinging the putter head between the inside set of tees or coins, then the middle set of tees or coins, and finally the farthest set of tees or coins while trying to maintain a consistent tempo. This is a great drill for length of backswing and follow-through. Using a metronome helps with this drill. This allows the player to visually see the results of different length backswings. A good tempo will result in the putter head finishing at its opposite member tee (or coin). A decelerated putting stroke will finish short. An overly-accelerated stroke will carry the putter head well past the tee or coin on the follow-through.