The single best practice for improving your shooting? Dry fire. Whether you are choosing a new firearm to purchase, practicing a new technique, or trying to fix a bad habit the practice of dry firing your gun will help you achieve your goals faster. Check out this article from US Concealed Carry for more info on using dry fire techniques to enhance your skills:
Before taking his first shot with a new firearm our instructor has our student practice dry firing to get a feel for the grip and trigger.