The document provides tips for writing effective emails. Some key points include using clear and concise subject lines; including an appropriate greeting; using short paragraphs and concise language; properly formatting the email; keeping the message focused; using signatures; proofreading before sending; and using CC and BCC fields appropriately. The document also provides examples of "dos" such as being informative and courteous, and "don'ts" such as using all capital letters or abbreviations.