Use a Power Stance.
Practicing confident body language is another way to boost your pre-presentation jitters. When your body is physically demonstrating confidence, your mind will follow suit. studies have shown that using power stances a few minutes before giving a talk (or heading to a big interview) creates a lasting sense of confidence and assurance. Whatever you do, don't sit--sitting is passive. Standing or walking a bit will help you harness those stomach bats (isn't that more appropriate than butterflies?). Before you go on stage, strike your best Power Ranger stance and hold your head high!