This is such a practical, simple and brilliant idea. Amy from The Red Chair Blog shows how she built this tower for about $35.00 in materials. The idea is to use it for all those items you need to take somewhere else (like library books), or you need to donate, or you plan to give away.
My office gets so cluttered with stuff I need to deal with in these ways. What a great way to keep things tidier – and to goad me into actually dealing with them once the boxes get full!