Client Retention ($20 / month) - The easiest client to obtain is the one you already have. Getting your clients to come back is not just about doing good therapy. It's also about reminding your clients that you're available when they need you. Since you should never send a BCC email to all your clients, softwares like ConstantContact.com helps you publicize your upcoming availability, your expanded hours, new groups, etc. And yes, they'll sign a HIPAA compliant Business Associate Agreement.