I have my own evolving method of file management, which is to say it mutates every time I start a new project. Like much of my work, when I come back to it months or years later I can not even begin to decipher exactly what the hell I was thinking.
This is something I have to think about again now that I’m shifting over to Avid. I’m not there yet, but I’m reading ahead and apparently Media Composer dumps all imported media for all local projects into a common folder. I’m already having nightmares.