Receipts

This will seem like a simple question, but I would like to know how all of you are storing your receipts. I’ve been scanning my receipts and putting them in specific folders on my computer. Every month, I back up the prior month’s receipts onto my external hard drive. Lately though, I’ve been using a receipt organization service, Shoeboxed (http://www.shoeboxed.com/). What do you all do to keep your receipts organized?