We have our books organized by room, since we have bookcases in different rooms.
LR: Tall shelf, House, gardening books and McSweeneys. Small shelf, childrens lit, the few first editions we own, Childcraft and Book House sets. Shelves by fireplace: art, photogrpahy books.
BR: favorite fiction, Heyers, magazine collection
Guest room --books by friends on one shelf. Music/guitar books on one wall, other wall is more fiction, also humor books.
Office -- reference books, biographies, car/motorcycle books, movie/theater reference.
My books are primarily organized by how often I want to reread them.
This.
And, to a lesser degree, by size, because I can't stand seeing tall-short-tall-short-short-short-tall-short-tall-tall-tall, etc.
People organize their books?
Currently, the only organization in my library is separation into piles of books that I mean to read and piles of books that I have already read. Some of the piles are on shelves.
It's not a good system, but it suffices. Sort of.
The books I've got on stack on the floor or tables are only there because I haven't had time to rearrange my shelves to put them into place. If they're on the shelves, they must be in the proper order, damnit!!
My books are arranged exclusively by height.
Dang, Scola, that is a thing of beauty!
Scola, that is awesome.
My books are separated into: plays, anthologies of plays, books about theater, screenplays, books about movies, fiction (with a subdivide of cyberpunk/Adams/Gaiman/Pratchett), humor, spirituality (those are shelved next to each other), comics, history/sociology/biography, art/design.
My books are arranged exclusively by height.
You don't have
Scott Pilgrim's Finest Hour
?
Also, that is totally cool.
My books are not very well organized. My comics are organized by title.