This document provides tips for writing professional emails, including starting with a salutation when addressing the recipient, writing in short paragraphs that focus on one topic or idea per paragraph, and ending the email with an appropriate sign off like "Best regards" along with your name. It emphasizes keeping emails easy to read by using correct capitalization and formatting and avoiding all-caps text. As an example, it compares two job application emails - one that is poorly formatted and lacks professionalism, while the other follows best practices for email etiquette.