Use a lock with a string attached to it to feel the momentum of the putter head and learn how to swing your putter like a pendulum
There are four keys to the correct grip: placement, positioning, pressure and precision. Check these four things every time and you will have a solid grip
Although one of the smallest players on the Tour, Sergio Garcia is consistently one of the longest hitters because he creates a tremendous amount of lag with his wrists on his downswing