Everyone knows that the key to sinking putts is consistency. However, it can be difficult to achieve consistency when you are unaware of your body position. If your eyes are not at the same angle every time at setup it is difficult to achieve consistency because your perception of the ball, club path, and target line are different every time you set up.
Luckily, there is a solution. A putting mirror! Almost all tour pros use a putting mirror during their putting practice.
What a putting mirror will do is give you the ability to ensure that your club path, eye sight, and target line are all on the same line. Your eyes should be directly over the ball, or no more than one inch inside the ball (this is what the best putters in the world do).