Fantastic post. My favorites, in order:
23: Your number one option for personal security is a lifelong committment to avoidance, deterrence, and de-escalation.
10: Someday, someone may kill you with your own gun, but they should have to beat you to death with it because it is empty.
13: Have a back up plan, because the first one won't work.
Also, the article has a bonus link to the 5 Greatest Gunfights of the Old West...