1. Pare down. Put little-used credit and gift cards in a separate wallet. Throw out large frequent-shopper cards—just add the small versions to your key chain.
2. Set a routine. Every day when you get home, take a couple of minutes to clear everything out of your wallet and put its contents in the right place. Throw away trash, file receipts in the appropriate organizer and put coupons in your coupon wallet or binder. A daily check-in should ensure that your billfold stays neat.