I found this on Pinterest.... I saved all my cards, engagement, shower, bachelorette, wedding, and 1st anniversary. I was first upset because I actually threw some away, but I don't think many more would have fit! Here's my attempt at a card book:

I used an old Express box to cut out the front and back cover.

I "scrapbooked" the the covers.

I put all my cards in order and punched holes in the corner.

I used a ribbon from one of my shower gifts to wrap around the book after slipping them all on a 2.5 inch binder ring.

The back of the ribbon is held on by little brads.