I have quite a few songbooks and can never resist one if it has at least one song I really want to learn and a fair price. I have found "new" verses to some old favorites this way and I enjoy seeing how different arrangements of the same tune go.

To keep them organized fairly early on, I started xeroxing the covers & tables of contents to go into a binder. That lets me know what I have (in case I've lent one, I note who/when) and it makes finding a song much easier than pulling down every book to look in the indexes. Whatever I adapt or re-arrange then gets copied into my personal playing binders.

How do you keep organized without being so organized you never play?