This document discusses best practices for professional communication. It begins by introducing common costs of poor communication like misunderstandings and wasted time and resources. Effective communication can provide benefits like clear expectations and stronger relationships. The document then examines functions of organizational communication like informing and persuading others. It also outlines different types of business communication such as face-to-face, telephone, and written correspondence. Best practices are presented for each communication channel, including preparing for meetings, taking notes on calls, and using proper formatting in written documents. The document concludes by emphasizing choosing the best channel for the message and using clear, concise language.