MY PREPARATION FOR PRESENTATION???

Actually, I worried for my presentation because my voice is slow down. Fortunately, my class for presentation has a microphone. So, I have to use it so that my voice become clear. Besides that, I hope I can present without feeling nervous already. Before this, whatever I present in front of, I always nervous. I don't know what should I do again to overcome it. But, maybe after this, I can do it well and don't want to repeat what I do before this in my life.....