I suppose it would be mostly practical skills, cooking, fixing things. Usually had to be done by people themselves.
Maybe also mental things like navigating (with or without paper map) and remembering their daily and weekly agendas.
What other things would be a big difference with the people today?
Chopping wood, managing a fire.
In the 80s we had to light a wood-fire hot water system. Chopping wood and managing the fire was one of our chores as kids. We had a wood stove in the kitchen too but never cooked with that because we had a gas oven as well.