I know I am late, but I have to answer this question. I went through the exact same experience and want to help other stutterers. I am 21 years old and an engineering major. My stuttering worsened over the last three years due to very little contact with people due to my chosen field of study (medical students, for example, have to interact with patients, give a lot of seminars etc.). Last December, I presented my work at an international conference. I struggled so much that I couldn't take it anymore. I decided that I would do something about my speech. This is when I came across a book by The Stuttering Foundation, and it has begun to change my life. It's been four months since I started working on my speech. Today, I presented in front of my class, and it was very smooth and I received applause at the end of my presentation! Now, what changed between last year and now? Two things - 1) I started working directly on my speech. I started analyzing what I did wrong and consciously tried to correct/modify my speech mechanism so that I could pronounce difficult words more smoothly. 2) I used the corrected or modified mechanisms in real life situations - talking with my family and close friends, ordering takeout on the phone, asking a stranger the time etc. These were tasks that were increasing in difficulty level for me. It may look like I am digressing from the topic of the question, but I am not. I believe that one must work on one's speech full-time for the effects to be seen in presentations, public speaking, and other stressful activities. If you cannot speak fluently with your family or friends, how likely is it that you will be able to present fluently to a group of strangers? Now, coming specifically to your presentation, I have the following advice - 1) Practice presenting to yourself at first, then to a close friend family member, then to a group of friends etc. As before, these should be in increasing order of difficulty. Work on the sounds you find difficult to produce, and make sure that you are very thorough with the content of the presentation. 2) The day of the presentation, try out some breathing exercises to calm yourself down. Sleep well the previous night, eat well and poop beforehand. 3) Have a bottle of water with you during the presentation. Have a laser pointer if necessary. Whenever you feel you're speaking too fast or getting stuck a lot, take a pause, drink some water and calm yourself down. 4) Make sure you breathe well and speak at a slow and comfortable pace during the presentation. 5) Focus on the content of the presentation rather than the people. You don't even have to look them in the eye. A few glances at some empty seats will do. 6) Remember, you're in control! Whenever you want to, take a pause. Be confident and think positively before and during the presentation. Lastly, remember that change takes time. It is only through experience that confidence and fluency is gained. Don't worry if you don't do as well as you wanted to. Most of the time, we judge ourselves too harshly! Hope this helps.