I bought one of the large index-card boxes and a pack of brightly multicolored index cards. I set up sections according to category and file them that way (it gives me a much greater selection of specific items). I carry it in my car (unless I'm adding) so I always have it with me. Waiting for kids at school, or even in a long line at the store is when I purge the expired coupons. And I learned many years ago to write my name & phone # on the bottom in permanent marker---I once left it in a shopping cart (gasp!) and thankfully someone turned it in but they told me they almost threw it out. It works great for me, it's hard plastic (it's gotten wet but the coupons are fine) and it snaps shut as well.