I am relatively new to CCW but I have trained myself for years to be aware about what is going on around you. I have also encouraged my wife who is handicapped ann vulnurable to be aware also.
I don't normally frequent convenience stores but when I do I don't just go aimlessly walking in. I sit in the truck for a few seconds surveying the parking lot, ice machine, telephone, the entrance and thesurrounding area. With practivce it doewn't take long. Look for something that doesn't look rite or out of place.
Secondly, avoid conflict. Walk away before you become involved. Same goes for restaurants,malls, especially parking lots and stores.
A little bit of awareness goes a long way. No one else is responsible for you so do it yourself.