In a gunfight, the most important rule is... HAVE A GUN!
Here is some shooting advice from various Concealed Carry Instructors.
If you own a gun, you will appreciate these rules.
If not, get one and learn how to use it... then learn the rules:
A -- Guns have only two enemies: rust and politicians.
B -- It's always better to be judged by 12 than carried by 6.
C -- Cops carry guns to protect themselves, not you.
D -- Never let someone or something that threatens you get within 20 feet.
E -- Never say "I've got a gun". If you need to use deadly force, the first sound they hear should be the safety clicking off.
F -- The average response time of a 911 call is 23 minutes; the response time of a .357 magnum is 1400 feet per second.
G -- The most important rule in a gunfight is: Always win. A gunfight is a deadly struggle. There is no such thing as a fair fight, so cheat if necessary.
H -- Make your attacker advance through a wall of bullets. You may get killed with your own gun, but he'll have to beat you to death with it, 'cause it will be empty.
I -- If you're in a gun fight: If you're not shooting, you should be loading. If you're not loading, you should be moving. If you're not moving, you're dead.
J -- In a life and death situation, do something. It may be wrong, but do something!
K -- If you carry a gun, people may call you paranoid. Bullshit! If you have a gun, what do you have to be paranoid about?
L -- You can say 'stop' or any other word, but a large bore muzzle pointed at someone's head is pretty much a universal language.
M -- Never leave an enemy behind. If you have to shoot, shoot to kill. If you end up in court, yours will be the only testimony.
N -- You cannot save the planet, but you may be able to save yourself and your family.