Those rolling filing cabinets are great for filing current stuff.
Also, don't hesitate to hire or barter for filing stuff. if you get a professional secretary, retired perhaps, and have her either follow your instructions or show you a simple system..make sure you don't one to OCD...he or she will probably do it quickly and painlessly..just get it done so you can retrieve stuff.
And it doesn't have to be file cabinets either. Colored plastic file boxes can just have loose papers in them by subject..medical, home, student etc. It doesn't matter if you spend an hour finding a piece of paper..it matters if you spent 20 and have a nervous breakdown doing it. mg