Scrap Paper Storage

• How do you store your scrap paper?
• Do you have "rules" outlining what you keep and what you recycle?
• What do you generally do with your scraps?

I've been going through a big box of scraps and making cards with a lot of it.

A lot I have deemed too small to warrant holding on to and using up space,

and a lot I have cut down into useable sizes and stored in a plastic divided case.

What do you do?