The distance you putt a golf ball is determined by 2 variables:
1) the SPEED the putter head moves back and through the ball
2) the DISTANCE the putter head moves back and through the ball
If you control one variable so that it is CONSTANT — then you can put all your attention on to only one variable.
It is generally accepted by teaching professionals that you should maintain the SPEED at a constant level — and thus you only need to adjust the DISTANCE the putter head moves back and through the ball.
To maintain your SPEED at a constant level you just use the exact same tempo for every putting stroke. Constant Tempo will give you constant Speed. Every stroke you make should be just like a Grandfather Clock…. the same evenly paced tempo — resulting in the same speed. Every time. Tick-tock, tick-tock,… the same.
Now to control the distance you roll the ball, you simply adjust the LENGTH of your backstroke. Whether you’re lining up a 20-foot putt or a 2-footer, the length of your backstroke determines the distance the ball will roll. The longer the putt… the longer the stroke. Simple!