Missed appointments are a major problem for medical practices, costing them revenue from unused appointment slots and potential future referrals. The document recommends using an automated appointment reminder system to contact patients via phone, email, text, and mail to confirm upcoming appointments and remind them, which can significantly reduce no-show rates. It argues the best approach is to combine different communication methods to maximize the chances of reaching patients and that regularly reminding patients to schedule follow-up appointments ensures continued revenue for the practice.