The biggest thing is learning to work with and depend upon others. Without electricity, self sufficiency is fools game. Once I run out of acetylene in my tank, my cutting torch is useless. Once i run out of gas for the genset, using a bellows on my forge means it will take much longer to get something done... and what about raw materials? its not like I can have Grainger overnight me some tool steel, or a melt crayon for hardening/annealing. Some friends put on a vintage weekend every couple years, where they do blacksmithing and farming without modern conveniences... and its really hard, but even then they are dependent upon electrically manufactured items. Sure, I can make new nuts and bolts if need be, and I have at times to save a trip into town... but there is a finite limit to the amount of raw materials, until the power comes back on.
But when you have the brain power of others, maybe you don't need a nut and bolt, maybe you can solve a problem another way. Maybe something which takes a day, now takes a month, but you have others to care for your family while you work on it.
This is not to say don't be prepared, but that there is a world of difference between a few weeks of a regional power loss, in contrast with a total loss of the grid/generation capacity over a long period of time.