If you see a construction site or a renovation near your house, ask the contractor or site manager if you can have some of the scrap building material. They usually will be happy to oblige you as long as you don't get in their way. They are going to have pay to dispose of the refuse so any that you take off their hands will save them money. It's a great way to get scraps for fire wood, wood for small projects, or old bricks to use in your garden. Of course, always ask permission before removing anything from a construction site!