Here at Popular Mechanics, we've posted a number of special issues on disaster preparedness, with stories on the top first-aid kits you can buy, steps to save yourself when a natural disaster hits, stories about smart survival tactics that saved lives, hundreds of must-have survival gadgets and gear and a lot more. There's also lots of government help on such topics. (This L.A. Fire Department guide (pdf) on earthquake preparation is actually applicable to a lot of other potential disasters. And there's much more information available at Ready.gov.) Survival gear is important to have ready at home. In particular, water filters and water storage devices are often neglected, but critically important, since clean water is often hard to come by after a disaster.