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?
Doing nothing. That might be the biggest loss in the last decades.
There is just this overtone of restlessness and tension that didn’t seem to be present prior.
Also connection with your local community. 50 years ago, it was basically a given. It was part of life.
Now, not so much.