This document provides tips for writing effective emails. It discusses that email is a preferred means of communication and must follow certain rules. It recommends spelling email as "e-mail" and notes there is no universally agreed upon spelling. The document then lists 10 tips for writing effective emails, such as knowing your audience, using a clear subject line, being brief, proofreading for errors, using appropriate formatting, being careful with attachments, understanding reply vs reply all functions, not oversharing emails, and re-reading before sending. Overall, the document offers guidance on writing formal emails that follow best practices.