Persuade the audience that their current communication method could be improved. To motivate or even justify improvement in a communication method, it is first necessary to establish what aspect of their communication method needs improvement. A frequent communication method mistake is an over-reliance on confidence or its opposite (timidity) when expressing oneself, instead of basing your emotional position on the needs of the particular communicative context. The phrase "It's not what you said, but how you said it," captures the essence of this problem.
Review with the audience different situations and the appropriate communication methods for those situations. For example, John M. Grohol writes that when discussing big important issues, the influence of emotion should be minimized. "Nobody can talk about important, big matters if they feel emotionally vulnerable or charged-up and angry. Those are not the times to talk about the serious issues (like money, getting married, the kids, or retirement)."
Practice communicating in different situation by role-playing. For example, if working with someone who is known for being a bit callous with his or her staff, then role-play as staff member and present him or her with a number of different interactions to deal with. Interject regularly during the role-play, teaching the person how to communicate more effectively in the situation. Present a written assessment at the end of the interaction, providing the person with something to reference as they attempt to improve his information communication method over time.