I had a bad bout with trigger punching when I was younger. I agree with most, it is mental. I used to do a drill befor I shot and after I shot for an evening. I would load an arrow and go through the regualr routine and draw back, putthe pin on the target and hold it on the bulls-eye with my finger on the trigger and not shoot. I would hold for a while and let up and not shoot. I would do this like 10 times to train my mind that I could hold it there and not shoot. It helped me get away from punching.