You MUST have a regular flow of new patients.
Patient flow IS cash flow.
PLUS keep the old ones coming back. There's an entire education about new patient marketing in this book. It gives you hundreds and hundreds of ideas. His book Unlimited New Patients demonstrates a myriad of tasteful ways to generate more new patients than you ever thought possible. His name is Howie Horrocks and he wrote a sensational book titled Unlimited New Patients.