Well, I figure that just about everyone should take some basic first aid and maybe cpr. But if you're outside a lot, either just a very active sportsman or a guide of some sort, it could be worth looking into a Wilderness First Responder course. There's a ton of good info in a class like that. In many ways it's almost an EMT, but more wilderness/slow response kind of things. You still don't get to play with anything other than OTC drugs. But as others have said, keeping a stock from past prescriptions, if possible, is a nice and easy idea. Keep a buddy just alive for a day or so while your PLB calls in the airlift.
J