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?
People got more practice solving their own problems, anyway. Education to use for that was unambiguously lower, though, and there was plenty of people just not solving problems.