Email marketing is the best way to get information to your customer base for pennies. It's fast, simple and provides almost immediate feedback about your effectiveness. You can't pay thousands and get that!
There are gaps in most fitness pros' approach though. I share here my own mistakes and how I fixed them with the step-by-step thought process to buiding a relationship with your customers. It's all about transitions. Bridge the gap between where they are now and where you want them...as new members and clients!
Find details in writing at www.voiceforfitness.com and the Fitness Professionals tab. The Dollars and Sense of Selling Exercise blog "The Right Words At The Right Time" is what you're looking for!