Some very good advice from everyone, but one thing that was constantly pumped into our heads while going through “Gunsite” was things never happen in real time. A gunfight will not be like those depicted in the movies, two gunfighters standing in the middle of the street taking shots at each other. You can bet your butt, if you ever get to the point where you must shoot then most likely both you and the perp will both be moving. You need to practice moving, shooting at a moving target and reloading at the same time, I admit most of us never get “really good” at this, but at least it familiarizes you with the practice and prepares you for an actual event.
I have used targets strung on a cable strung between two trees, where someone pulls it for me; I have also used a 55 gallon drum and had someone roll it down hill. You need to practice moving in both the same and opposite directions. At one time I could consistently place four-five rounds on target with a high capacity auto, if I got one shot on target with a revolver I felt lucky.
Bottom line, if you ever get in a gun fight I’d bet no one is standing still. And remember, if using someone to make the target move, don’t forget SAFETY!