Sure, the ol' reliable list. Not what I was getting at, but always good for people who are brand new to prepping.In most collapses...skill sets
Food production
Medical/dental
Textile production
Cobbler
Carpentry
Masonry
Mechanics
Tooling
Metal working/blacksmithing
The basics...Food, water, shelter, health, transportation and anything that helps people save time and energy/calories.