be a good speaker..how???

To speak in front of the stage will make me in silent and can't speak. We see that how the debate person speak loudly in the stage. I very proud to see the person like this because i can't be like them. I don't have confident to speak in front of audiens. So I want share some tips to be a good speaker ;

• must be confident and assured. We must not show our nervous
• use our own experience
• must be enjoy yourself
• must lively and energetic
• knowledgeable about the topic we want to talk
• look good and use the stage as well
• speak without stumbling and use correct grammar
• have opinion about the topic
• speaker must positive outlook, cheerful and cooperative
• organize the point that he talk.

must try at your home :)