We should watch how the Politicians talk to the audience. We should watch how the US or UK Congressmen/MPs answer to the questions fired by their foes,press people. We should even learn from President Obama, Bill Clinton, Mrs. Clinton, Sr. Bush,Kennedy,R Reagan, Ex PM of Britain Tony Blair, Margaret Thacher etc. how they spoke in the audience. And above all, we must practice often that will reduce stage fear. Hope that helps.