Paperwork is the answer.
Every household has some form of paperwork that needs to be kept in a file. The first step will be to determine what you wish to store your files in. It could be an oak two drawer filing cabinet, a Rubbermaid portable hanging file box with closing lid, or even one of those nifty plastic crates you can pick up at any stationery store. Step two is to prepare the hanging files. Now you might be able to find some cabinets and boxes that come with a nice set of hanging files already, but most will require you to purchase them separately.