Before we get to the four rules we suggest you get into the right frame of mind. A weapon is not always a problem-solver. It is your responsibility, as a gun handler, to not exacerbate an encounter. If you can verbally defuse a situation try that first. Now:

Pick the right gear for your handgun
For concealed carry to work, there are three things that need to be a perfect fit: the operator, the handgun and the holster. The holster you chose should completely conceal your handgun. Even more, you should be able to smoothly and effectively draw your gun from that holster. You will need to do a little research because some holsters may not be ideal for every body type. The holster may also be too worn to be safe and effective.
When you get the right holster for your concealed carry, the next thing you want to do is practice. You should do various drawing and holstering drills from difference stances. There is nothing worse than having a holster that limits your reaction time or puts you in difficulty when drawing your weapon.

Pay attention to the clothes you wear
The whole point of concealed carry is to carry a gun undetected and have the element of surprise. With this in mind, you should dress accordingly to maximize your advantage. Pick out clothing that doesn’t draw unnecessary attention and avoid wearing tactical clothing outside the range. You should avoid making yourself look like a gunslinger.
The clothing you choose should help you blend in and nobody should suspect that you are carrying. If you wear fit clothes, the contour of your holster can be outlined and people will figure it out. Ensure your clothing is loose enough to completely conceal your weapon. There are various types of holsters that will help you with this issue.

Remember that you’re not Superman
Owning and carrying a gun can develop a psychological impact. People often have a Superman complex, an unhealthy sense of responsibility. That being said, most of them forget they are not the law enforcement and they are everything but invincible. When exposed to a high stakes situation, they will feel they need to do the right thing.
For example, if you’re at a gas station and you notice an armed robbery attempt, you might feel the need to do something about it. I advise you to double check that instinct before you take matters into your own hands. First of all, you can’t solve other people’s problems and second, your concealed carry is to protect you and not to enforce the law. Always look for a way out if there’s one. In case a conflict can’t be avoided and you have no other choice but to be involved, be prepared to act.

If possible avoid gun free zones
For most of us, our concealed carry is like a Visa card and we don’t leave home without it. If you’re lucky enough to live in an area with a low crime rate and well-established communities, you might not need to carry it with you. In fact, weather or not to carry your concealed weapon depends on where you are going.
However, criminals do not respect the gun free zones and they won’t stay away from places where guns are prohibited. As far as concealed carry goes, if you believe a place is not safe, you should avoid it all together if possible. When that’s not possible and trouble arises, my honest opinion is the criminal should not be the only one who is armed.

Remember, just because you carry a concealed weapon does not mean you have to use it. Sounds silly to have to say it but there are those out there who want to “shoot first and ask questions later” which sound tough and impressive but can cause more problems than it solves.

However, that said, if the SHTF you are certainly prepared to protect you and yours!

To learn more, including “realistic expectations” go to Prepper's Will. Just remember, your weapon is not a single problem solver and it’s better to curb a conflict rather than using your concealed carry. Be legal, be careful, be answerable, and most of all — be careful!