Hold that finish
TOM Watson and Greg Norman, a couple of my childhood idols, always rehearsed their practice putting stroke before the actual stroke. Tom Watson grips the putter at a 10/10 pressure which is fine as long as the pressure is maintained for the whole stroke. My preference is a 4/10 pressure for the hands.
From the time that a practice stroke is made to the actual putt, the hands must maintain the same grip pressure for the entire stroke. This ensures that the putter face remains square at impact. It would be like an actor rehearsing his lines before he is ready to go on stage in front of a live audience. Make your practice stroke a dress rehearsal for the stroke, using the same length and tempo required for the actual stroke.
Holding the finish also relays a great trigger to the brain and helps you remember your good putts. This really works because the feel of your stroke is still in your system. Once you stand up out of posture or move your feet before the ball stops rolling the feeling of your stroke disappears immediately.