waynelokey: Or you have a putt dead center no slope you hit the ball dead center ball goes left why?
A very common mistake for many players is to ignore the foot break-the first 2-3 feet the putt travels. The start of a putt is critical because if it starts off on the wrong line you'll miss. Missing the ding on the down side of a break will always miss, too.
Start looking at your putts in thirds and pay most attention to the first and last thirds.