This document provides guidance on email etiquette. It discusses why email etiquette is important given the lack of non-verbal cues in email communication. It then outlines best practices for various elements of email such as general format, writing long messages, attachments, delivering information and bad news, complaints, and avoiding flaming. The document recommends keeping messages concise and clear, using proper formatting, and considering the tone and needs of the recipient. It also provides tips for specific situations like communicating with professors.