Reclaimed wood is in demand for use in eco-friendly construction projects. Log on to PlanetReuse to offer up detritus produced by your home renovation, including lighting fixtures and garden furniture, to other builders or homeowners.
Or you can drop them off at your local Habitat for Humanity ReStore. ReStores sell donated goods at discounted prices; the money is used to fund the construction of Habitat homes. Each ReStore is different, so contact one in your area for information on what items they take.