Jacob Sitati, Managing Principal, Maurice + Fischer
Be Confident. Be confident in what you can do with your company. If you are not confident and willing to tout what you can do differently from every other company, then people will not want to work with you. He recently got that large utility company to sign up with him because he looked at them and said that he could do it better than a larger company.
Be Courteous. Common courtesy is important and can go a long way towards making a good impression on people. Returning emails and calls in a timely manner is something that some people seem to have forgotten, but really goes a long way towards making a good impression.
Publicize Your Offering. Get the word out about what your business is and why it is better than the competition. As Jacobs has said, you can be the best at whatever you do, but if no one knows about it, then it does not and will not matter.