7. In ten years nobody will remember the details of caliber, stance, or tactics. They will only remember who lived.
In other words, the important thing is winning the fight... all the rest is extraneous BS.
8. If you are not shooting, you should be communicating, reloading, and running.
Movement is important, because a stationary target is one hell of a lot easier to hit.
Even if you are alone in the fight... you should be communicating with somebody... anybody, that can help you or help you call for back up. Failing that, communicate with your opponent with a storm of copper-jacketed lead.
The reloading aspect speaks for itself... and running? Oh, yeah! Trust me, running is a good thing to do if you can. A gunfight is a bad place!