This document provides instructions on how to write an effective memo, including defining what a memo is, choosing an audience, establishing a purpose, and outlining the key parts and format of a memo. It recommends including a heading with to/from fields, date and subject; an opening that states the context, problem and purpose; a task segment describing proposed actions; a summary of key points; a discussion providing details and recommendations; and a closing that requests action and notes any attachments. Formatting tips suggest using short, clear headings and lists to improve readability.