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?
I use a graphical tablet (wacom) to write my notes. If i write my notes, i remember them much better.
I would type my notes in class because it’s faster, then rewrite them by hand to study off of. except by the time I finished rewriting them, I usually wouldn’t need to study off them any more