This document provides guidance on writing effective memos. It explains that memos are an important form of corporate communication and that learning to write them clearly and concisely can help communicate complex topics as well as distinguish yourself professionally. The document outlines the typical parts of a memo, including the header, subject line, opening paragraph, supporting details, and closing. It also provides tips for writing style such as keeping the audience in mind, getting to the point early, and using active verbs.