Sometimes we'd do laudromats. Go in, leave a couple of magazines, drive to the next one. So, about one minute's time, no talking to anyone and then another 5-10 minutes to drive to another one. Lots of "placements" and almost no effort.
One guy, we'd just drive down the street and size up the house. If they didn't look home, we'd pencil that house in. Otherwise, we'd chalk it up to not-interested.