Good suggestions , thanks.

Agree with being able to have humor as a coping mechanism.
It is important to be able to cope with everything, because it is cool to have things and skills, but all is for nothing if whole situation is too much for you and you simply brake down.

Hard to train for that, but good suggestion is to be able to leave some things for later and worry only for present moment when SHTF.

As for the “real” skills, I always admired guys who could make something out of the nothing, or those who are good with building something with very little material.
Folks who have mind for “inventing” or re-inventing things and solutions are gonna be valuable.