Speak with confidence

Good communication is the key to success, whether you're speaking in front of a large audience or trying to get a point across to a new friend. If you want to know how to speak well and confidently, you've got to believe in yourself, speak slowly and carefully, and have strong convictions about what you're saying. 

For one thing, it is polite for others. Also, eye contact will help others to listen to your thinking carefully. Find a few friendly faces to focus on so your confidence goes up while you're speaking and that you're communicating your message even more clearly. If you look down at the floor, you won't look confident, and if you're looking around while
 you talk, people may think that you're distracted or looking for something better to do.

This will promote your own confidence, which is important when you speak. With more confidence, people will take your thinking more seriously