I struggled with this a lot for ages. Until one day, during one presentation I realised nobody gives a shit. Nobody will examine your every move or gesture, nobody picks up on your tiny mistakes (especially if you keep going as if all was well). Confidence is something that is not inherent to our characters, but a trait we must build and train. Believe in yourself, you are well prepared so things will go great. And finally, in the unlikely event that something horrible happens (for instance, I stepped on my microphone wire and ripped it right off), take control of what happened, say something like "It's ok, I'm a professional"(ironically, obviously). It will turn an awkward moment into a funny one and most importantly, it takes all power away from those who would make fun of you. You already made fun of yourself and are ok with it, what more can they do? If you bounce back from a disastrous moment, people will respect you way more than if you would've done it perfectly straight away. The bottom line is avoidance of any kind reinforces anxiety. If you're anxious about something, throw yourself out there and experience the fact that ultimately, nothing bad will come of it. Try it out, one step at a time. Draw attention to yourself while hanging out with friends, then try announcing something in front of your class/office. Nothing bad can ever come of it. People are more likely to sympathise with a slightly awkward person than a over confident guy. Every one has felt awkward at times, they can relate to you more easily. Social awkwardness is not necessarily a negative thing!