Practice, practice, practice. Stuttering happens. Knowing what to say and how to say it will help. Practice out loud in front of the mirror, practice to a friend, practice to a parent, practice to your dog -- just keep practicing. After you're done practicing, write it down from memory. Then practice some more. When you're up on the podium rocking your presentation don't look people in the eye -- look at the top of their heads. It'll make it seem like you're making eye contact without the awkward realization that you just made eye contact. Get a good night's rest. Eat something well before the presentation. Go poop well before your presentation. Take care of yourself so your practicing can achieve its full potential. Don't forget to breathe. Do some breathing exercises before your presentation. It won't take more than 45 seconds. You got this!