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?
Yes, when temperature management was a proper skill. Now we drive cars with such sufficient cooling systems they never overheat! Imagine, just putting it in gear and driving through to your destination, no matter the conditions or duration. And fuel management! Gas stations everywhere? A fuel gauge? A range calculator? So lazy. Whenever that commenter grew up was the absolute peak of skill. laughs in horse mechanic
If you’re not driving a 0-0-2 steam locomotive are your even driving?