Build Yourself As A Leader In Your Field
The more you build yourself as a leader in your field, the easier it will be for people to refer to you.
To do this, you will have to do more than just read trade journals. You could conduct informal surveys or polls or write articles or books on your work. Send copies of relevant news clippings and summaries of survey results to your referral sources. With such a reputation, you will be the one people call when they need any resource in your area of expertise. Hopefully, business is just around the corner.
Also, by joining network and civic organizations, you can become a center of influence.
Global Marketing Plus was started to help small businesses compete on the same level as large corporations but for a lot less expense.