How to write a business memo. A memo should have an action plan with specific steps on how to carry out the plan. Strong memo writing tips can help you create an effective message. And the message itself should be clear and concise, no. Tip: If you're already in Word for the web, get to the letter templates by going to File > New , and then below the template images click More on Office.com. It is often written from a one-to-all perspective (like mass communication), broadcasting a message to an audience, rather than a one-on-one, interpersonal communication. Under Choose an option, click View only. For longer memos, consider writing short headings that clarify the content of each category. You can follow the question or vote as helpful, but you cannot reply to this thread. The header of a memo includes five important pieces of.