I saw one of these one day when I was looking through some craft sites. I can't remember where I saw this idea but I thought it was cute and a good way to recycle some of the floppy disks I have and no longer use. I decided to make one and it was so easy!
I removed the old label and applied a graphic where the label was on the two disks. I attached the two disks together using ribbon. You can use your imagination and use different methods to attach them together. The holes are already there so this was easy. Add any kind of embellishment or trim that you like and stick a post-it note pad inside. That's all there is to it and it cute and different.
I think one of these would be good to hang by your front door, along with a pen or pencil, with the outside graphic saying "leave a note".
Front, Back and Inside view: