The onslaught of winners on the PGA Tour adopting the Belly Putter or Long Putter has sparked both increased interest and criticism from the golfing public. Increased interest from players looking for a better solution on the greens and criticism from traditionalists who feel the use of a longer putter is outside of the spirit of the rules of golf.
If your goal is to shoot lower scores, then course management should be at the top of your list, as it's the primary reason Tiger Woods is the greatest golfer of all time.
Start with a routine: Notice when you watch PGA Tour players, they have a routine for every shot, especially when it comes to putting. Better players know a routine is necessary for making consistent strokes.
Without being able to "catch the ball squarely" on the clubface, one has little chance of maximizing distance. A key to controlling the clubface and generating efficient power is found in rotating the lead forearm properly.