Reddit reviews Rubbermaid Techfile Plastic Magazine File, 3 x 9 5/8 x 11 5/8 Inches, Black (40406ROS)

I have a bookshelf next to my desk dedicated just to embroidery stuff. For floss I just use 6 of those plastic thread organizer boxes. I keep a long pencil tray, like this, where I keep random odds and ends that I want within easy reach (like needles, scissors, Fray Check, etc.). Fabric (whether flat or in a long tube) get stacked neatly on another shelf. I also keep a small bucket of scrap fabric there, which comes in handy when I want to test a new stitch or see how colors look together or something. Another shelf near the bottom holds rarely used supplies. And I have a magazine holder like this for patterns.

As for WIP and finished pieces, they go in this large binder. WIP go in the rainbow accordion file in the front (the fabric & pattern) - one per divider. I put finished projects in a clear plastic sheet protector on the rings. It's fun flipping through seeing everything I've done, and it's nice having most of them in one place to show other people. Large projects that don't fit in the binder when finished are usually gifts or one of the few things I put on display.

I use this organizer to store the thread colors of current WIPs so I don't have to put them back in the main storage every single time I stitch (plus small scissors and needles), and it is also quite convenient to slip in a bag or purse if I want to bring a project with me.