If you're carrying OWB, even if concealed, watch out for chairs with arms. My holsters always want to hang on the arms when I try to squeeze my fat behind in one.
At the store, learn to reach for top shelves with your weak hand. Otherwise, your carry garment might ride up and expose your gun.
Otherwise, just carry around the house for a few days, and you'll figure out what most of carrying in public is like.
Get ready to feel like someone's going to scream "OHMYGODMANWITHAGUN!" at any minute. Don't worry, after a while, you'll figure out that most people wouldn't notice your carry piece unless it's slightly larger than a rhinoceros.
And welcome to TFL!
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman