This document discusses best practices for customer service in the modern era. It outlines five levels of customer issues from critical failures to general feedback. It also discusses three main channels for customer communication: text, voice, and face-to-face. Finally, it provides five methods for resolving customer issues, focusing on apologizing, resolving the problem, offering refunds or discounts, giving freebies, and asking for advice to turn critics into advocates. The overall message is that excellent customer service is crucial for business success through positive word of mouth.