There are two objectives.
1. Save the receipts
2. Have things organized for tax time so you just need to pull up a report.

The easy way to do this is as follows:

1. Pay everything by debit or credit card, and to use checks as little as possible.

2. Get Quicken or Money and download all transactions and code them into the appropriate categories in a timely manner, so that you don't leave yourself time to forget what the purpose of a transaction was, or to split it into the correct categories if it's partly tax-deductible and partly not, or just belongs to different categories. It's not necessary to upgrade Quicken or Money every year--just get it and keep using that version for two or three years. They don't change enough every year to make an upgrade necessary.

3. Maintain just 12 monthly folders or envelopes for your receipts. If the folders or envelopes are neatly organized you won't have much trouble finding the appropriate receipt if you're audited. Alternatively, if you have a small business you could put the business receipts into a separate set of envelopes, with another set for the household expenditures. But that's not really necessary--you just need to have things organized and neat, so that if you need to get to the receipts, you can. The more sets of envelopes you have, the more places there are to search if you're trying to find something. If there's only one place where that receipt could possibly be, you'll find it a lot faster.

Moving things from one folder to another is too time-consuming and also just in the act of moving them, you could drop something or get it into the wrong folder.

If you download the transactions, the dates, amounts, and payee will already be coded for you. You'll just have to do the occasional split and a little bit of clean-up. The software can even code the categories on the basis of previous transactions, tho you would want to double-check.

Reconcile all the accounts each month and put the reconciliation reports in the appropriate envelope. It doesn't really matter whether you have a month-end cutoff (tho it's preferable for a business)--just put the report and a copy of the statement in the envelope, and keep the envelopes neat and tidy and safe.