However, I must tell you it can be very effective. If you make enough calls using the proper telephone techniques, you will eventually get hired. After you do it for a while, you will be able to get a feel for how many total calls it takes to get hired once. Maybe you find that one hundred calls get you ten people that show interest and one to hire you. You just continue making the calls to the right people, and every one hundred calls or so you get hired.
Referral marketing comes from two primary sources.
This means someone saw you speak and liked you. They either hire you themselves, or tell someone else about you, and the someone else hires you. This has many advantages in that the person hiring you does not have to be convinced to hire you by means of demonstration materials, which hardly ever show how good you really are. Usually you don't have to haggle too much about your fee either, because you have already proven your value by your previous performance. You talk to people you know and people you don't know about what you do.