According to the EPA, home construction and demolition projects annually produce 58 million tons of waste, 90 percent of which could be reused. If you're looking to renovate, consider donating your discarded materials -- from doors and sinks to light fixtures and tile -- to one of the "reuse centers" cropping up across the country.
Donations are tax deductible, and the proceeds from resale often go to community charities. Many centers also sell donated home supplies to the public at a discount, so while you're there dropping off your unwanted bathroom sink, look around for what you need to complete your kitchen upgrade -- and save some cash. Find a reuse center near you at the Rebuilding Center.