Can we list useful skills for preppers to learn NOW

[BDG]

Although you have welding, I would say Black and White smithing, covering casting with copper, iron, aluminium, lead, brass and iron / steel and hot and cold forming all of those too.

Agricultural techniques without the use of major machines.

Livestock husbandry

Harnessing a horse and putting the horse to the thing you want it to pull. Horses do not like to walk backwards when they cannot see what is going on behind them. This is why gypsies are good at punching.

Knife and saw blade sharpening.