Learn survival and craftsmanship skills. Also, buy a sustainable property of ideally several acres at least, and develop for yourselves a farm and keep livestock, so that despite high prices or famine, you could live based on what you own. Train yourselves to protect your ownership, as well. If you need a vehicle, buy a tough, sturdy one that could handle rugged terrain. Ideally, you should also find a nice woman, get married, and have children. Plan for the future.