I will look at the flipper and shoot, then immediately look at the shot I am going for. Let's say it is from the right flipper. If I miss left I know I flipped too late, miss right then I flipped too early. I have a mental picture of where the ball was on my flipper. So next shot I adjust where I flip the ball on the flipper based on if I missed too early or too late. It's something that I have gotten better at over the years. Now I know that if I miss a shot I need to know HOW I missed it so I can correct on the next shot. By the 2nd or 3rd shot I should be able to make it.