1) A set of folders for the monthly statements of each utility (water, gas, electric, phone, etc.). I accumulate the statements only for the current year, and discard them when a new year begins.

2) A set of folders for accumulating the current month's receipts for each bank & credit card account. At the end of the month these are dumped into...

3) A second, matching, temporary set of folders for last month's bank and credit card receipts; this is where I store the receipts until the corresponding statement arrives; after balancing the statements, I staple receipts and statement together and file them in...

4) A set of folders for the accumulated year's statements from banks, credit cards, medical practioners (doctor, dentist, optometrist, etc.), prescriptions, insurance, church, etc. These I'll need at tax time next year.

It's not a simple system, and because it's still a new system I sometimes get confused as to where I should file something, but I expect (and hope) that when I do my taxes next year, all the pertinent paperwork will be presorted and categorized.
Mike