With the abundance of miscellaneous wedding related papers, binders aren't enough. Storage boxes are great, but living in a small apartment, I don't have much real estate to dedicate to them, so I have been buying accordion file folders. They are great for all of the receipts, gift cards, stationery and invoices I have been accumulating. But most important, they fit in my purse and are easily stored on my book shelf.
(left - right)
Russell and Hazel - Moleskin
See Jane Work
Paper Source - Traveler's Companion
Real Simple - Martha Stewart Crafts