Aerosol cans, wire hangers, hotel soap, even asphalt shingles are just some of the things that can be recycled but are oftentimes overlooked.
Do you have half-used paint cans cluttering your garage? First of all, don't even think about dumping them down the drain. (Um hello? That'd be releasing toxic chemicals into the water supply.) Why not give it to a school for their art department or even Habitat for Humanity? You could also find a facility that will recycle it.