People speak because they trust you. People speak to share their ideas, express their opinion. They value you as a listener. It is our responsibility to value them as speakers. Do not break their trust. Do not show distrust. Listen to people with open mind and see the change you will experience in your communication. Be a valuable listener. You will always be in demand.
There is no magic potion that you could drink and watch the magical words spill out of your mouth even as you could hypnotize the listener with your oratorical charm. However there are tested and proven practices that can nurture your skills and help you overcome your qualms. So while there is no secret formula, there are simple things that you could follow to overcome your fears. I call it ' My Rule of 9'.