The Gift of Fear by Gaven De Becker came to mind while reading this article. It's been a while since I read that book but I do believe it recommended that before you go out the door you tell yourself that you are ready to fight, for those who lack confidence in personal security. This puts someone in a fighters attitude, more ready and alert for possible dangers.
There is major downsides to this attitude of course. Opportunities for friendship, enjoying scenery and relaxing the mind when they are clearly available are lost when in a fighter's lens. I can see all too clearly everyday who has identified themselves too much in a certain belief system or type of personality, lacking this tool their single dimensional life lacks a certain flexibility, or perhaps the word beauty is more appropriate.
"I can only enjoy things like this". "I would never be able to enjoy or be able to use something like that". This lack of perspective hampers opportunities not only materially but mentally as well.
Einstein's quote is applicable: "Imagination is more important than knowledge"--people who enjoy trying new things or creative types are bound to find this much more acceptable to their taste.