I do something like:

From Documents > ‘routine documents’ > FY > Month > Section (personnel, operations, or logistics) > and whatever task from there for my main day-to-day stuff

But, for operations outside of the monthly sort, like managing personnel training, it gets really weird;

From Documents > Training > FY > department > categories of training > subcategory > individual person’s folder for the course > application folders with dates (the last folder here is when the one that got approved and they’re going to the school on).

This one is where I end up with file names I can’t rename.