This one is short and sweet. From now on, whenever you hit a really good shot, REMEMBER the feel of that shot - the positioning, stroke, and contact. Then repeat. When you make a poor shot, put the feel of that one out of your mind like it never happened and remember the feel of the good ones. The only time to think about a poor shot is if you absolutely cannot figure out how to make it a good one, and so have to analyze it. That is all.