I agree with longbowman about the mental aspect....... I shoot my best when I just forget about form and let them rip...... Next thing I know I hitting my 4 inch spot at 20yds every time!!! However, it doesn't take long for my mind to wonder back to my bow arm, my arrow, or my release and I start getting flyers........ It's very hard for me to stay in that calm, relaxed shooting mode.....