There is actually a survivalist society and they used to run courses. Basically, it comes down to making the house look vacant and already looted. I dropped out of that years ago, but I expect that there are still people involved.
I came to the realization that it was going to be a matter of luck. If you are in a heavily urban area when civilization goes into the shitter, you are shit out of luck. If you are in a remote rural area, you may be lucky if the nearest highway is miles away or unlucky if the nearest highway passes by your front door.
So, if you live your life expecting the imminent collapse of civilization and always living in a remote rural area, you give up all of the income and richness of life that living in an urban area provides.
I'd rather have the income and richness of life. However, that means that I, like everyone else lives with the potential of something like the Watts riots of the 60s happening.
In a heavily urban area, it will be impossible to hold off a large crowd that is determined that the survivors will get what you had.