Position yourself as the professional of choice and market leader in your city, state or region. Think global, act local.
You don't have to be rock-star famous before you are recognized as an authority in your field. You just have to begin to get the word out. Your goal is to be the person that people think of when your field is mentioned. At first, that may happen only locally, but take heart. Start where you are, with what you have, and you'll light a spark that could eventually become a firestorm of publicity.