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
On the course you should focus on simple thoughts when you swing, generally keeping to one thought per round but rotating through them each round