The process by which we work through all the skills we need to perform successfully only within our mind. Once you have all the physical skills for making a foul shot, you can improve your percentage by spending some time mentally rehearsing the steps you go through to launch a good shot. This can be taken a step further, to mental practice, in which you may try to learn some new skills. In either case, you must use proper fundamentals even within your mind, and you must think positively about the outcome.