Learning how to putt in golf is equally if not more important than driving or hitting your irons. You need to be able to putt well to finish strong, and hopefully well under par. A few simple steps, along with a lot of practice and patience, will have you well on your way to lower scores.
Stand with your legs straight, your nondominant side facing the direction you want your putt to go. Grasp your putter in a reverse overlap grip. First, put your right hand on the putter's grip with your thumb pointed down to the ground and fingers wrapped around the shaft. Slide your hand up the grip until its heel is approximately three inches below the top of the shaft. If you are left-handed, just reverse the directions and hands.
Put your left hand on the grip in the same fashion, with the heel of your left hand touching the top of the shaft. Lift your left index finger and put it on top of the fingers on your right hand. Keeping your grip, extend both arms straight out in front of you until your club is parallel to the ground. Again, just reverse your hands if you are left-handed.
Bend your elbows 60 degrees and pull them back toward your body until they meet the sides of your rib cage. Lock them in place. This will help you have a more controlled putt since your entire upper body is engaged instead of just your forearms and wrist.
Bend forward at your waist and slightly soften your knees. Stop when your putter head rests lightly on the ground about three inches behind the ball. Shuffle your lower body backwards, as needed, until the putter head is between two and three lengths in front of your toes.
Take a practice putt by swinging your club through the ball, with the hash mark on top of the putter striking the center of the ball. You should hit it straight. If it angles to the right, move your putter further from your toes before you hit it. If it angles left, move it closer to you. You may need to adjust your distance several times.