I can't take the credit for this idea. I received one of these booklets from my friend Maggi a while ago. So when I needed some ideas for small gifts to create for a fund raiser some friends of ours are hosting, I thought these would work well.
Each booklet contains one of those 3 x 3" post it note packs. I cut pieces of mat board for the covers and then used decorative cardstock to wrap both the front and back covers. I used my bind it all and then added various types of embellishments on the cover of each.