Have you seen these cute bird clips by DCI. They come in a set of 16. I wanted them as soon as I saw them and knew that I would find some use for them. They are about the same length as a clothespin and have a strong grip. You can get them at Amazon.
So, here's how I decided to use one of them. I tied a bird clip to the end of a piece of yarn that I hung in my classroom doorway. The string is attached to a magnet that I can move to any position I need. If I have an important message/note that I don't want to forget, I clip it to the bird so it
Here's more info on the bird clips.