Welcome to MobileRead, Sexton Blake.
I guess I'm not so imaginative. I have one called "My Books" that I use as kind of an on-board reading shelf (Hmm. perhaps I'll re-name that one "Reading Shelf"

). One called "Bible" ... guess that's pretty self-explanatory, except that I have one full copy, and another variation that's broken up into ~37 separate "weekly reading" files). One called "Manual" that I keep the Reader's manual in (which shouldn't be taken to imply that I actually
read the manual at all

). And one called "Travel Dox" that I put things like maps and directions into when I'm traveling (it's empty at the moment).