Try not to come to the presentation without support. Introduce characters that play an important role in the presentation of the product. This technique works as social proof.
Do not be afraid to involve your audience in the process. For example, invite listeners to you to test your prototypes or products. Invite people to take part in the created scripts or processes. The person who tried and felt your invention, outcome or product, interacted with it, more likely will get a desire to learn more about it.
Jobs rarely conducted the entire presentation on his own. He usually surrounded himself with a support group. During one September presentation, he included: Vice President of Marketing Phil Schiller, iTunes Software Developer Jeff Robbin, and four other game developers. That evening, singer Norah Jones also performed on stage.
Of course, Norah Jones is unlikely to make a speech at your next presentation, but if you can present your project with a colleague (or client), then it’s better to do it that way.