There are three areas that I think are a good start: 1. food storage, preparation and self provisioning 2. Water purification 3. Basic first aid. The issue of food can be as simple as understanding how to maintain a balanced diet with easily stored foods or as complicated as how to provide all of your nutritional needs in a given environment (Urban, Rural etc.). Water purification is also critical, and while boiling is always a good solution, understanding other means of water purification is important. Finally a basic Red Cross first aid class is a great way to start learning the skills to deal with all the things that can and will go wrong with our bodies.