Step Two. Support the headline with three key benefits.
As I discussed in a previous article, the human mind can only process about three pieces of information in short-term memory. Specifically outline the three or, at most, four benefits of your product. Draw three arrows from the headline to each of the key supporting messages.
Step Three. Reinforce the three benefits with stories, statistics, and examples.
Add bullet points to each of the three supporting messages. You don't have to write out the entire story. Instead write a few words that will prompt you to deliver the story. Remember, the entire message map must fit on one page.