In your own mind, how do you see yourself and what it is you are doing? Do you view yourself as a true sales professional with an important message (offer, idea, etc.) that your prospective customer will want to know about?
It is highly likely that how you see yourself in your own mind, your self-image, will be communicated in one form or another to those you encounter.
Send a congruent message by seeing it and believing it in your own mind first!