The format of a memo follows the general guidelines of business writing. A memo is usually a page or two long, should be single spaced and left justified. Instead of using indentations to show new paragraphs, skip a line between sentences. Business materials should be concise and easy to read. Therefore it is beneficial to use headings and lists to help the reader pinpoint certain information.

You can help your reader understand your memo better by using headings for the summary and the discussion segments that follow it. Write headings that are short but that clarify the content of the segment. For example, instead of using "Summary" for your heading, try "New Advertising Recommendations," which is much more specific. The major headings you choose are the ones that should be incorporated in your purpose-statement in the opening paragraph.