Success greatly depends on

People will not follow you if they don’t know what you want or where you are going.
So:
Simplify your message: The key to effective communication is keeping it simple.
Show the truth: Believe in what you say. Then, live what you say. There is no greater credibility than conviction in action.
Seek a response: The goal of all communication is action. Every time you speak to people, give them something to feel, something to remember, and something to do.