I absolutely love public speaking. Here are some tips that I've gathered.
1- Silence is fine. Speak clearly and don't use filler words like um or like
2- Plan out (if possible) a general outline of what you are going to say. Don't write your speech down word for word because you will just be reading, though. Without an outline, your speech is going to be a babble or really awkward. Also, a good intro and conclusion would help because most people tend to remember the beginning and end of presentations.
3- Speak with confidence. This means eye contact and speaking loudly and having good posture!! The biggest problem with public speaking skills is that they don't appear to know that they are saying. Before you speak, try to go to the bathroom and look in a mirror. Tell yourself that you are fucking awesome and everyone's gonna know it.