If you get your hands on an old solid wood door be sure to use the free instructions at the link to repurpose it into a fabulous bookcase.
If you happen to have two unwanted chairs, you can repurpose them into a bench using this free tutorial.
Recycle pallets into deck chairs with this free tutorial.
These handy stackable bins can be used in any room of the house and you can make two bins from a full sheet of plywood. Just follow these free directions.