Not saying I am perfect but I consider myself to always be very aware of where I am relative to anyone or anything else whether I am driving, walking or just out in a park or the beach. If I stop and I am in my car, I am looking around and just being aware of my surroundings and other cars; I usually leave a little room in front of me so that I can scoot it necessary. I do the same thing when I park, when I am going into my garage etc etc. It is not necessary to be paranoid but simple common sense and awareness are important and necessary. I would bet that a considerable number of car jackings happen because of inattention by the driver.