Between points, think about what you want to do, especially at the start of the rally what serve to use, what type of receives. Think about what shots you want to do during a rally as well looping, hitting, quick blocks, etc. If you do this, you will learn to reflexively go for the shots you are thinking about. However, before the rally starts, blank out your mind, and let the shots happen. If you try to control your shots during a rally, you will not play well. The conscious mind is only a fraction as fast as the unconscious mind.