The document outlines five key steps for preparing effective business messages: 1) identify your purpose for the message, 2) analyze your audience to understand who will receive the message, 3) choose ideas that will appeal to your audience and convince them, 4) collect relevant data and information to support your ideas, and 5) organize the message with an introduction, body, and conclusion. The most important steps are determining the purpose and analyzing the audience to understand their characteristics and tailor the message appropriately.