I can't claim this organizational tip as my own, this came from my good friend Pat.

When I first started the Long Ridge writing course, she bought me a notebook and put pockets in them and instructed me to keep all my work in them. This has proved invaluable. As I proceed in the course, I am to refer back to previous assignments. Keeping it all organized is a big help.
I do have it organized on computer and backed up to a flash drive. Each folder is labeled by assignments. I keep what I sent and then I also keep an edited version (what the instructor sends back).
This photo shows the folder I keep my hard copies in. I also print out any "Talk Abouts" my instructor has suggested for further reading. Then if I need more help in another area like "weedy words" I can find it quickly. I can always find these on the student center for Institute of Children's Literature, but I still like to hold papers inmy hand and have them there at the computer when I am working on my assignments.

Do you have a unique way of organizing your work in progress?