"Nobody can afford right off the bat to buy 20 years of dehydrated mashed potatoes," he said. He would buy a little extra every time he went to the store. Peace of mind increases as the larder grows, he said. "If you stock food for a year and lose your job, you can at least eat for a year," he said. Besides food and water, his stash includes certain medicines and some cash -- "If it's worth anything in the end" -- and important documents, some of which he's duplicated and stored off site. "You can't be prepared for everything,...