Yep I am an EMT and a Trauma RN 3 days a week. I play Police on the others. Like traumaslave said, direct pressure is the best blood stopper. After that you can look at elevation and pressure points. Medicine in the field is mostly going to be based on keeping the person alive until they can get definitive care. CPR and first responder would be a good start. Then you can move on to the "alphabet soup" that trauma slave talked about:EMT,RN, PALS,ACLS, TNCC, CEN, CCRN, NRP, etc. The bad part then is keeping up with all the dang renewals! Some good ideas have been mentioned, like tampons. You need bandages, dressings, splinting supplies, a few OTC meds like motrin, benadryl, and that should about cover it.