For MacOS:

Keep things insanely neat and orderly — using numbers, and simple pre-fix names.

Also, keep your desktop empty. A cluttered desktop is bad for the mind.

Also, no more PC or Windows, ever. Windows is ugly.

Downloads is the ‘working’ folder.

Treat your downloads folder like your scratch disk. Use it for works in progress, and when it is done, clean it out, and empty your trash.