Start with your yard. I'm still hunting mine, and although my finds are out thinning out, there may ALWAYS be stuff to dig. Then hit up your nearby family, then friends, neighbors, then co-workers, then friends of friends, cousins and their college roommates. THEN after you've exhausted every acquaintance, go to the oldest part of town and start knocking on doors. (Long drawn out way to say there are lots of places to go, just look around!) Good luck!