Learn to speak with a melodic, fluent voice. Find out how to organize your thoughts and make your point in a compelling manner. Develop a resonant voice at a pleasing pitch. Build your credibility by increasing your confidence and impact. Make your appearance work for you.
Most people are surprised at how enjoyable our teamwork can be.
You may be far away or so very busy that getting in for a personal consultation is difficult if not impossible. Call to see if this approach can work for you. You will be able to review your presentation in the most natural format - seated, talking with someone. You will not be asked to do anything artificial. You are probably a lot better than you think you are.