Re-purposing existing materials keeps trash out of the landfill and can save a lot of money.

DNR  DNR Waste Management Find materials or make your materials available to others.
 Restore Habitat ReStore The ReStore is an Iowa City-based 5,000 square foot treasure chest filled with new and used building and housing materials.
 Freecycle Freecycle A nation-wide network of folks giving and requesting free materials.