It might be the most difficult communication skill, the dramatic use of silence. Consider that the most effective technique is to say nothing. That means, that sometimes, you need to stop talking. The use of the dramatic pause might be the most powerful tool in your communication toolbox.
Those opening moments of your presentation are critical to establish your credibility and confidence with the audience. Don’t waste that time trying to work up your confidence. Instead, start with confidence and convey that with your first words. You owe that to your audience before you can expect them to listen to your presentation.