How can I reuse or recycle … pizza boxes?

It’s Friday and it’s been a busy week at Recycle This Mansions so we are, I very much suspect, going to be dialling in for food tonight.
We’re lucky that we’ve got a few good pizza places in the vicinity so will be on cheese-highs by bedtime (weee, cheese dreams!) but we’ll wake up remorseful tomorrow, after our binge tonight, because we won’t know what to do with the cardboard pizza boxes that will be covering the living room floor.
We usually just fling them in the cardboard-recycling bin but any other suggestions?

They seem to be one of those things that we used to absentmindedly collect, back in the day when everyone thought it was a great idea to give away promotional mousemats or that it was *the* cheap and cheerful present to buy anyone who ever admitted to using a computer.
Many moons ago, I met the man who had the idea to make cotton bobbins out of plastic rather than wood (since the latter had friction problems apparently). He was quite a wealthy guy by the time I met him so I guess he made some money from the brainwave. But, of course, at what cost? After all, plastic: boo.
A suggestion from Heather:
















