Choke down on the club, make a three quarter swing and pick the ball clean
Cocking your wrists on the backswing creates a tremendous amount of power that is imparted on the ball when the wrists uncock at impact, you can do this three ways, early, late or swinging, see which works best for you
Putt when 1 or 2 feet off the green with short grass and chip using a loftier club as you get further off the green