I just thought i would post this tip to people selling over the phone or trying to make appointments. I was a highly successful advertising sales person who closed deals on the phone and my friends from that time have all built successful businesses using this same principle. You build your credibility in advance before you even get on the phone, because otherwise people won't listen. What you do is get a well known organisation involved, eg, the local chamber of commerc, or a local charity, or a well known person in their field. When you call you say, hello mr. I'm calling on behalf of, or we are doing a project with (name or organisation). This immediately gets their attention and they will listen.
We would never just get on the phone cold trying to sell anything unless we had names we could lead with that would break the trust barrier.