Kill 'em ALL!

1. Be courteous to everyone, friendly to no one.
2. Decide to be aggressive ENOUGH, quickly ENOUGH.
3. Have a plan
4. Have a back-up plan, because the first one probably won't work.
5. Be polite. Be professional. But, have a plan to kill everyone you meet.
6. Do not attend a gunfight with a handgun whose caliber of which does not at least start with a ".4"
7. Anything worth shooting is worth shooting twice keep shooting until it stops moving. Ammo is cheap. life is expensive.
8. Move away from your attacker. Distance is your friend. (Lateral and diagonal movement are preferred.)
9. Use cover or concealment as much as possible.
10. Flank your adversary. Protect yours.