Practice putting without a backswing.
I have a tendancy with my putter to get guick, causing a short gouge stroke creating deceleration. Generally when putting on the practice green from two foot and in I will only "push" the ball to the hole with the putter with no back stroke. This helps me to get a better roll on the ball without any deceleration.
Once that feel is incorporated and working, I resume my practice session putting with a full pendulum stroke.
As many has mentioned and I do concur. You must eliminate 3 putts, work on chipping and also putting to lower your scores.