[LizPf]

I also use folders for roles, or for Uber-projects.

My current folders are:
Housewife
Shopping
T-Shirt Shop
House Remodel
Kids
Personal
Computer Admin (family Macintoshes)
SF Con (DH and I are Registration Chairs)
GT Con (I give a presentation every year)
Templates
Someday/Maybe

I have a couple other things that could be folders, but are top level "projects"* at the moment:

Friends
Knitting Design
Freecycle (I'm the local Moderator)

--Liz

* I use the word Project in quotes because I have few formal projects, and use this more as a sub-folder, a place to hold related actions, whether they are a linked project or not. We've discussed my heretical status elsewhere, but this works for me.