When we moved, I had several containers out and as I came across something small in an odd place (like in the junk drawer, I would toss it into its designated container. I did this with things like erasers, pencil sharpeners, binder clips, safety pins, random dice, etc. Now we have a container FULL of binder clips in all different sizes.
We use them for the obvious things like holding stacks of documents together, but once I started looking for different uses for binder clips, I was amazed at the possibilities. Not only that, but I came across a quick and easy tutorial for covered binder clips. The tutorial covers the clips in paper, but I did the same process using fabric scraps.
I even made some matching magnets for a couple of the clips.