Last week, I had a returning student who had just gotten into three gun competition. Therefore, he has been practicing with his neighbor. They started out about even. My student then started to dry fire his handgun every night for 5 to 10 minutes. His friend asked him if has been shooting without him. When informed no. He was told years ago by me that dry firing is the single most important think you can do to become a better shot. He finally took these words to heart and found them to be true.
A couple of rules about dry firing, 1 ) Only use a modern centerfire firearm. 2) Make sure no ammunition is in the area. 3) Look and feel that the firearm is empty. 4) Only dry fire in a safe direction with a safe back stop. (if you have an accidental discharge no one get hurt.) Once done state out loud I am done dry firing for the day and do not dry fire again that day. ( Most everyone I know that had an accidental discharge when dry firing it was the second time that day.