Just like the Atlanta of the AMC television series The Walking Dead
, zombie-infested cities seldom operate with any sort of efficiency. Often, when both essential and nonessential public servants are dead or have been zombified, basic services suffer. In case of a power outage, invest now in a gas-fueled generator
—or, better yet, one that can be operated manually by a stationary bike. Since zombie invasions often lead to nervous stomachs, you'll also want to make sure you have a toilet in good working order in case the water goes out. Line your toilet bowl with heavy-duty garbage bags. Then pour in some cat litter, fireplace ashes, or sawdust. When the coast is clear, bury your waste in the backyard so that any nearby zombies won't detect it.