Well. You understand the main springs. You have acquired a knowledge base to be able to "resist" and remain operational despite adversity. Comfortably installed at home, of course, it's quite simple to tackle. It is less so when you find yourself in a city in ruins, without access to water and or the only emotional support possible for those around you ... It's you! It is at this moment that this memory of your readings will be necessary. Obviously, nothing prevents you from "modeling" in your mind the different scenarios that you might be faced with.
Now, and while your only option is victory (or rather survival in any case), let's imagine that the emotional upheaval you felt during the collapse of your world can be used as a weapon. Yes, a (the) psychological weapon, through a set of techniques, protocols, measures ... Remember your state of despondency when you understood that you will never perceive any more how "before" and you will understand any the power of such a weapon.
To "dig" the subject, we will start with an official document, edited by the French armies:
Principle of psychological warfare
This document (more than complete) is at the scale of employment of an army, or, in any case, of a constituted troop. It is up to you to adapt the diagrams presented to your own situation. With the thought that the will to survive is inherent to our species.
Enjoy reading, see you next week!