Most rewarding was probably learning sales. I learned from a guy named Daniel who was very inspirational, almost annoyingly upbeat like a motivational speaker. In sales your attitude determines your success and is a good lesson in life.

Rice, beans, and multivitamins. You can live fairly healthily for a long period on very little money eating like that. In the ozarks I had various nuts(black walnut and acorn) as well as fish, berries, and other wild edibles. It always comes down to more blandless or boringness rather than actual starvation.

Overall it made me a much more resilient person and I know that no matter what happens in life I will be able to handle it.