For example, you could use oil company literature to detail a gas station. Use a large logo to build the pole sign out front. Use smaller ones on the building itself. In addition to cloth samples and printed material, many advertisers send out buttons, key rings, pencils, pens, even product samples. Some uses for these kinds of things are more obvious than others.
Buttons can become signs.
Of course you can always use them for their intended purpose around the layout to make up schedules or fill in a mail order form for that new brass engine. As for the other stuff, the rule of thumb here is to look carefully at the object before you relegate it to the wastebasket. Look carefully, use your imagination and the possibilities become endless. Well there you have it. I hope this article has helped you discover just what a resource junk mail can be.