Check out this site
http://www.archound.com/ for a program called DA Document manager. I do not own or use this program but listen to a pod cast where one of the guests was a user and described the product in great. No this guy scans everything and has keeps backups. he says that it allows him to keep everything in order and easy to locate when needed. He scans the receipts, warranty cards and anything needed for everything he purchases. He also scans every bill and anything else of importance that he may get in the mail.
Now you already need to have a scanner nut if you look at the site it may give you a direction as to what type to look for.