I agree with Debra. Your existing clients (no matter how many or how few you have) are perhaps your best and most effective way to get more clients. There’s nothing like a satisfied customer who has personally seen the value of what you do, to help promote your services. A second, and often overlooked, way to expose yourself to potential clients is to write or speak to public forums. I love to write, and so for me writing articles for a variety of publications was a natural fit for me. Writing timely and accurate articles or arranging to speak to groups about a health, exercise or fitness topic of interest will go a long way to help you find new clients.
I hope this helps.