I was thinking of scanning all my receipts instead of filing them, not sure it's a good idea
Well, please do not kill trees tor me. I scan everything, mostly using one of my two desktop scanners. They give these away with cheap printers. I scan and file the documents and then file (stuff in a box) them chronologically.
I have a number of scanners on my iPhone, including Scanner Pro general purpose document scanner, and Red Laser bar-code scanner. While I do not use these frequently. I would not want to do with out them. I use them mostly when I am traveling and need to bill someone else for the expenses.