I think most helping professionals don't think about marketing. Many aren't comfortable promoting themselves. I think of marketing as a reflection of your ideas and thoughts to others that may be able to use the information. Market by giving something away - your ideas on certain issues, symptoms, problems, etc.
One of the ways I have used to market is by creating a website a year ago. I have been surprised how many people are starting to use the internet to find counselors. People have liked reading my bio, seeing my picture, and reading my articles. I am finding that there is a lot that contributes to being found in a Google search (but that I will leave to the experts).
However, you don't have to have a website to be found on the internet. Do you have a business that your potential clients will search for online? If so, here are several places to list your business for FREE:
1. Google maps
2. Smart pages
3. Yellow pages
5. Merchant Circle
Being self-employed is a big commitment, and I imagine you have a valuable service that could benefit people. Once you realize you have something valuable to offer others, wouldn't you want people to be able to find it?