Don't Loose Your Focus
Do you ever allow situations on the golf course to bug you and affect your game? Have you ever gotten upset when someone stepped in your line while putting or played to slow?
These situations may not be fair. However, they are merely facts. If you allow them to get you angry and upset, you will loose your concentration and strokes. Learn to treat everything as a fact without getting emotionally involved. Even Tiger Woods had to learn to ignore cameras clicking in the middle of his backswing.
Negative emotions will hinder what you are trying to accomplish. Train your mind that facts are merely facts. Don't let them become an excuse for you loosing your focus.