http://www.guns.com/2014/12/01/editorial-20-rules-for-winning-gun-fights/
1. Be prepared to use deadly force.
This emotional, mental and psychological decision must be made long before the incident arrives. You may have to shoot a man, a woman, pregnant lady or a teenager. Think about it before the time arrives. Be prepared to stop a co-worker, a neighbor, a teammate, friend or even a relative. You may have to physically hurt or kill someone that you know or someone you’ve talked with or like or someone you think you know well.
10. Never give up your weapon.
If someone other than a police officer tells you to drop your gun or give up your gun, don’t. Be prepared to use it. If you give up your gun, you could die
13. Shoot until the threat stops.
Forget the two-shots and stop drill. Try a six-shot rhythm drill on the target’s chest.
18. Be aggressive.
Violence of action is your friend, as long as it is controlled. Be tactically smart, but aggressive in movement and attitude. Call it what you will, but in the end, more violence wins.