Most people are nervous about giving oral presentations.  Anticipate your nervousness and select appropriate strategies so you can speak effectively.

Be prepared:

Knowing what you are going to say and being confident in your knowledge is the surest technique for avoiding nervousness.  Review your presentation at least four times--if possible, in front of a mirror or a relative or friend.

Avoid using long sheets of paper or notes.  You can easily lose your place, and you don't want to hold something that flutters when held in a trembling hand.  Use index cards for notes and write main points in large print only on one side.  In this way, you will not lose your place.  (One thing less to worry about.)  Don't write out complete sentences.  If they are there, chances are you will read them and be locked into a rigid delivery that will only heighten anxiety.  Practice handling and positioning all objects you will use--even your note cards.  Try to be familiar with the room before you have to speak in it.

Take a few minutes to get ready  before you begin.  Give yourself something to do that will help you focus and expend some excess energy, e.g., move the podium or adjust the visuals. Stand erect. You will look confident, and your audience will sense your confidence.  Establish eye contact immediately.  A responsive face will go far to put you at ease.

Take a deep breath.  Diaphragmatic breathing will relax you and give you greater vocal power.  Correct breathing from the diaphragm is very helpful for controlling anxiety.  Make sure you know how to breathe from the diaphragm before you start.  Next time you are lying flat, place your hand on your diaphragm and become aware of its movement as you inhale and exhale.  Memorize the sensation.  Work on breath control by inhaling in a standing position with your hand on your diaphragm.  Feel its extension as you inhale, and then exhale slowly while counting out loud.

Don't worry about being nervous.  Everyone is.  A little anxiety is a healthy thing; it keeps your energy level high.   Open with material you especially like so that you will begin to think about sharing the message early in the speech.  That will help you gain control.