I toss'em into a drawer in my three-drawer plastic caddy that sits alongside one of my sewing tables.
Sorry, I know that won't help! And no, they aren't tidy, but they are dust-free and I only have to look at them when I am scrabbling around for thread. I do have a thread rack that hangs on the wall, and there are a few spools still there, with threads hanging. But more and more, my thread is migrating to my thread drawer, and I am thinking of how I can repurpose the thread rack.
Iris