To help my students improve their green reading ability I use the face of a clock. Take four tees and place them around a hole. Like the photo shows, one at 12 o'clock, one at 3 o'clock, one at 6 o'clock and one at 9 o'clock. Walk about 15 feet behind your ball and kneel down. Look at the hole and decide what "time" would the ball go into the hole. If the putt was straight it would go into the hole at 6 o'clock. I don't know many putts that would go into 12 o'clock, but you will get the idea. So let's say I think the putt is going to break to the left. I decide it will go into the hole at 4 o'clock. I will walk from the hole back to my ball. I will then find the high point or apex of the break. This is where I think the ball will start turning toward the hole. This will be my aiming point. I will make two dry run strokes that will roll the ball the proper distance. (Remember, distance control is the most important elements in putting.) Now I have a point to aim at. Commit to that aim and roll the ball the right distance. You might be pleasantly surprised how much your putting will improve.