Start by bending the inside part of the paper clip down. You now have a little hook.
Use the paper clip hooks to hang your swatches onto the crate and voila, you now have a way to organize swatches. And, if you like, you can always hang the crate up on the wall. It's a great way to see what kinds of projects you have on the needles, or are planning for.
Once I'm done with a project, I use an old cigar box to hold all my old swatches.
Now I need to come up with a project that can use up old swatches.