When golfers suffer from inconsistently hitting the ball left, right or straight, the most likely cause is leaning too far over their feet, causing poor balance
If you are practicing and start hitting bad shots then step away from the ball and work on re-establishing solid contact with a few bump shots in order to get the feel for center clubface hits
Universally known as one of the greates putters ever, Jackie Burke had a simple putting set up that held the putter up so that he could focus on the putter face and kept his arms close to his body for control