Relatively recently, an interviewer asked Robert Kiyosaki (rich dad, poor dad author) where we should be putting our money right now, and he answered something to the effect of "canned tuna" because you cannot eat money. We've moved investments to real estate and instruments that are nearly independent of stock markets, metals in hand (lead is still a metal, right?) and outside of that? Things that will be harder to find in the near future or which will be much more expensive. If you want to keep cash at home, remember to assemble small denominations and coins, if you expect to buy or trade for small goods.

Canned food and things that can be vacuum packed for long term storage, for example. Extra little containers of (clean) gasoline. Heirloom seeds. Foreign coffee. Thinking about barter items, especially easily stored and carried items, you might consider cigarettes, whiskey, protein bars, first aid supplies (antibiotics, bandages, anti-diarrhea), batteries. Baby formula or other powdered milk, lighters/matches, camping items like water purifiers, camo stoves and small propane canisters, it all depends which way you want to go.