Rather than letting them build up in your wallet or some envelope like I do, Shoeboxed lets you send receipts, business cards and documents to them via postage-paid envelopes or camera-equipped smartphone for a really lowmonthlyfee.
The reason that secured credit cards are a good and inexpensive option is because they are reported to the credit bureaus on a monthly basis, and they have a lowfee structure and annual percentage rates of interest.