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Years ago, I worked in the IT department of a residential school. There was a lot to manage, from help desk requests to purchasing, maintenance, networking issues, and other administrative tasks. I typically had several projects ongoing at once, large and small. Nearly all of them had support files that needed to be referenced or updated regularly. This is where the Noguchi system was brilliant, as it moves frequently-used files together while creating an archive of seldom used files.
I used this system too for a while back in the day. It would work really well for organizing writing projects. Just throw the notebook/manuscript with all of your related research and materials into a single envelope.