Cardboard Recycling

I buy a lot of stuff online, and so I end up with a lot of cardboard. I've love to know how to recycle it, especially if someone would pay for it. I'm writing to the King of Cardboard:

Do you know a good place to recycle small amounts of cardboard? Save your truck and figured you might know. Is there anywhere that will pay for cardboard at least to cover the cost of dropping it off?

If anyone knows how the paper recycling business works, I'd like to know more about it.