After living just outside of Trenton, NJ for 5 years during my teen years I learned the value of situational awareness real quick - after being jumped you tend to pay more attention to your surroundings. I also learned the value of standing up to your attacker(s) - they view backing down as a sign of weakness which only serves to embolden them further."Don't go stupid places, don't associate with stupid people, and don't do stupid things" and in all likelihood you won't ever have to defend yourself. Don't look like a victim - keep your head up, walk confidently, look around and keep track of who is near you or watching you, don't avoid eye contact. If you don't look like prey, then predators will pass on you and look for someone else.
I am 99% certain I will never find myself in a situation where someone demands my wallet. The other 1% of the time the situation is going to be so bad I better have both guns blazing or Im toast.
Thats my story and Im sticking with it