Step 1: Find the Hidden Stockpile
Rumor has it, there's a stash of non-perishable goodies buried somewhere in the neighborhood. Don't bother trying to find it, just Google 'stockpile location [your city name]'.
Tip: If you're in a densely populated area, good luck finding that stash without tripping over your fellow survivors.
Proceed to Survival Hacks 002: How to Start a Garden with Only Rain and Hope