This is a book about improving communication skills in a range of different settings. Instead of thinking about communication as the transmission of information from one person to another, this book shows that we ought to think about communication as a practical art of producing effects on others. Once we start to ask "What effect have I had?" then we are in a better position to improve our communication skills. In thinking about interpersonal communication, small group communication, writing, public speaking, and leadership through questions about the effects we produce on others anyone can significantly improve their communication competencies. Through one hundred small lessons this book provides practical tools to immediately be a better partner, teammate, writer, speaker, and leader.