I would say it very much depends on which computer you're trying to organise. For my work drive, everything is sorted by year then project, and each project st

I would say it very much depends on which computer you're trying to organise. For my work drive, everything is sorted by year then project, and each project starts with a timestamp (= start date), so: 2014/ 2014_01_Project A/ 2014_03_Project B/ etc. and on top of this there's an admin folder to sort contracts etc. For my personal computer, I tend to organise things by file type (apart from personal projects which are organised as per above), so one folder for videos / images / audio / documents, and then I tag the file accordingly (using the Mac OS X tagging feature). Hope this helps!