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?
Doubt it. We like to think this becaus we only recall the smart ones. The stupid were left behind. We as society have way more exposure to each other now. Doesn’t make people from 50 years ago any more clever. Especially with less education.