Always a good idea. Whether it be a natural disaster, social unrest, or a Chicom-created super virus, grocery stores only keep a few day's worth of inventory in stock. Personally I keep a few months worth of shelf-stable human food on hand (normal stuff we eat anyway) and pet food, and rotate through it so it's never old. Also a good stack of firewood for the wood stove, lamp oil and lamps, batteries, etc. Guns and ammo, of course. I'm not in very good shape for water though. Need to work on that.