Most of what I read about survival has to do with being lost in the wilderness or escaping to the wilderness, where one would kill animals and build shelters. It seems more likely that most people would need skills that would better serve some type of economic survival rather than wilderness living. It can take very little anymore to put one in a position of having no income. If you think you might face that risk, the skills you relied on to be employed out in the world may not mean much. The economy of unemployment and especially if deciding to be on the move for a while will mean you need to be able to fend for yourself while offering the ability to do things that others cannot or would rather pay for than do themselves. You'll not get far at a truck stop in the flatlands by expousing your expertise as a marketing expert. If instead you can work on diesel engines or can wash dishes, then you may get to eat that day. Consider the basic skills that most of our grandparents had that are now considered almost lost arts. As society became more specialized, the types of employment changed, of course, and people spent so much effort getting more educated to reach higher status that basics were no longer needed. If you have the time, you might want to search out some knowledge that's useful in the real world rather than the corporate one. You might wish you had if your life suddenly takes a drastic turn in an unexpected direction.

Some examples of these would be whether you can change a tire on a vehicle (plenty of people cannot), start a fire - if you don't carry a lighter, better have some way of doing it, change an electric outlet, do basic plumbing repairs, use an axe efficiently, cook over a campfire and for that matter, cook without any appliances. Do you know how to drive a tractor, run a backhoe, dig a trench with a shovel, drive a big truck with a manual transmission? It takes only a few tools and supplies in a bag or pouch to be useful rather than useless. Know basic first aid, there may not be the luxury or funds to call 911 or drive to a hospital. On a similar note, I have a firearm and know how to use it. It should be basic, with readily available ammunition, and it should blend in. The ability to blend in is an extremely important point.

Wherever you find yourself, look like the people who live there as much as possible. Being unemployed and broke is not the time to draw attention to yourself. People universally distrust "different" and you'll not be in a great position to answer multiple questions from anyone in law enforcement if asked. Consider what you really think of some homeless person you see and then consider how others will think of you if you're the one without a physical address. Blend in and be nice - others who have very little will be the people who will help you with places to stay and finding underground economy jobs once they learn what you know how to do. What you were in the past is not going to help, it's what you can do for yourself and others that will make the difference. It's not hard to learn, just seek out people with real-world basic skills and ask them to show you. Next time you get your oil changed or some wiring fixed at your home, watch what that person is doing. It may be you think that you'll never need to know how to do what that repair person is doing as your life and your job are so completely secure. If so, I hope for your sake that you are right. But, it takes so little effort to learn while you still have that opportunity and before you end up where you can only be sorry that no one needs an accountant or your Master's degree at a campsite.