Keep the message simple. Be careful of too much information. Audiences can only absorb one key message per presentation, t herefore focus your discussion. Be prepared, it builds confidence. Do not feel the need to keep every second occupied with sound.
Silence can be extremely effective in punctuating a comment.
Therefore, do not be afraid of silence spots. This is probably the most challenging aspect of public speaking. Let your hands animate your message. Keep them by your side and inactive when you are not gesturing. Do not count-off with your fingers.