You have to give a big, important presentation in just 15 minutes. Your heart is racing, your palms are damp—you’re starting to panic. It’s completely normal. In fact, most speakers, beginners and veterans alike, readily admit to feeling nervous in the moments leading up to a big speech or presentation.Whether you’re stepping to the front of the room to speak to just a few people, or making a grand entrance in a ballroom to address thousands, here are 13 ways to effectively use the 15 minutes before you go up to prepare your body and mind for peak performance: 1. Talk positively to yourself. Read more.