When I was in college, I sold what amounts to encyclopedias door-to-door. I know the company I worked for still does this, although I would have gladly told anyone who asked who I worked for when I was selling (The Southwestern Company - Nashville, TN).
We drew maps and highlighted families with kids so we knew who to market to and so we would not waste time on those without kids. It also helped if you had kids names of families who had bought from you so you could "build rapport".
By the way, I dislike solicitors, but I would recommend the job to anyone who wants to thicken their skin and take a little abuse. It's good for you.
Yes! -- I did Real Estate, and became a Rejection Addict!!