As I plan to get my CPL as soon as I can I'll add some of the things I plan to do for this
1) Gun Selection -
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at least a dozen pistols, revolver, semi-auto, in varying calibers (I like 40 S&W, but I'm not tied to it at the hip)
2) Gun Location - Where it's convenient, I suspect that depending on the time of year, and the clothing I'm wearing this might vary. My current personal preference would be strong hand waist, but again I'm not tied
3) +1 or not +1 - Likely +1 its carried for a reason, if I need it, I don't want to worry too much about whether or not there's a round in the chamber yet or not. Simplify the problem.
4) Practice, practice, practice, I'd like to be able to tack drive with my concealed weapon at 20 yards minimum, ideally 50 yards.
Situational awareness, combat training etc. (Since you mentioned it) I did Karate for about 20 years, and hold Dan (Black Belt) grades in 4 other martial arts too. I taught self defense classes, and these are the rules I taught (plus a lot of techniques, not just the rules)
Rule 1
Avoid locations or events that might lead to some trouble
Rule 2
If it appears that trouble is going to occur, leave, be calm be slow, make it look like you're just leaving casually for the night.
Rule 3
If you for some reason missed rule 2, and trouble is almost upon you, then, if safe to do so run. Find the nearest help, be that police, friends, people you know, anyone else, the local store etc. If you cannot i.e. you need to protect others then...
Rule 4
Use whatever weapon you have on hand to disable your opponent(s) as quickly as possible. This includes but is not limited to tables, chairs, glasses, other people, pool cues, pool balls, cats, rocks, spears, yourself etc. Then run, following rule 3.
Rule 5
Welcome to the next world, or your local ER (if you're lucky)
My karate Sensei used to say a knife in a fight adds 10 years to that person's training i.e. don't fight a guy with a knife, outside of a dojo, unless you've studied a martial art for at least 10 years. He did not tell me how many years a gun adds to a persons training I can't imagine it would be less; I would not under any circumstances tackle (unarmed) someone with a gun, which is why I'd like a CPL in case this happens.