I do too. I have lots of very old books, and don't mind a bit cutting them up.
I use music books or anything. The first time my son saw something I had made out of a music book page he almost fainted. He is a librarian and a musician. I think he thought I had committed the unpardonable sin by cutting it up.
He is over it now. I told him I was giving that old book a new life rather than letting someone put it in the trash. Music makes such pretty things.......
"We all get heavier as we get older because there's a lot more information in our heads."
- Vlade Divac, Basketball player