I love bags! And totes, and purses, and bins, and all sorts of organizational items. I have several of those plastic mesh bags to keep stitching projects - love them! Zip loc bags are awesome for sorting different kinds of stash.
But one day while shopping at a Daiso store (a Japanese dollar store), I found these cute little plastic paper holders. I bought a couple thinking I'd use them for stamping projects in progress, but right now I'm using one for the bird projects I've been working on. It's about 3/4 inch deep and the latch keeps things from falling out. I'm finding it convenient to have open in my lap to keep all my supplies at hand, but contained - at least for a smallish project like this.
What have you repurposed to organize your projects or stash?