What do you do to keep "organized"?

[Zoidberg]

For starters, buy a shredder and go through your mail as soon as it's in your hands. If you're able, pay the bills you receive right then and there. That cuts down on most of what usually kipplefies my desk.

http://en.wikipedia.org/wiki/Kipple

I have a link to a database I set up in Filemaker for receipts. I can quickly generate totals in January to prep my taxes. I used to just throw all my receipts in a box and fret over said box until the middle of March. Haven't done that since my Katrina year.