I have one file drawer that holds personal/family/home stuff... including financial folders (Credit accounts, bank statements, kid's school stuff, receipts, appliance booklets, etc.)
Another file cabinet has two drawers, and that one holds all business related files. These include receipts, subscriptions, credit accounts, and so on, as well as various reference materials.
The critical documentation: birth/death certs, ss cards, titles, etc. are in a special binder which has it's own spot in my office.