I keep them for one year, if they are not part of my tax return information. The statements from banks, etc. get ditched at that same time, except the end-of-year tax statements . Tax paperwork, excluding 1040, get worm-binned after 3 years. 1040 forms get kept indefinitely. Property tax info we keep indefinitely as well.
Warranties, etc. get kept until they are defunct. Receipts get chucked as well at that time.
I keep one copy of the rundown of our house insurance benefits, which they send once a year or so.
As for paperless stuff, if it involves yet one more password to memorize, online account to set up, etc., forget it. I hate that. We end up printing the statements anyway because I don't store stuff on the computer, and that is a serious drain on printer ink. I would much rather have them pay to send me a paper bill/statement.
I've started just to divide stuff into piles: stuff that gets chucked next year, stuff for taxes, then a pile for more or less permanent stuff that gets sorted every few years. Anything more specific just hasn't seemed necessary. Then again, we don't have a lot and haven't had much need to go mining for a specific piece of paper.
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