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?
First thing that came to my mind, as well. They say people reacted more intelligently to building fires in that past for the same reason. Not that it mattered much if you go all the way back before fire codes.
Way too often I see someone making a camp fire by just kind of stacking store-bought wood, and drenching it in accelerant, which is probably related. Bitch, if you just want quick heat without thinking about it, why not a space heater?