The following lists some techniques people use for coping with this fright:

your audience understands your nervousness; they know what you are feeling and
will forgive it; similarly they will forgive honest mistakes

nervousness is usually invisible; most will not notice the small changes in your voice
or occasional mistakes; most speakers who describe themselves as nervous appear
confident and calm to the audience

be yourself; let the real you come through; relax, practice some deep breathing
techniques;

begin in your comfort zone; practice with friends; share your fears with friends

check out the room first; check out the space, the equipment, the lights
concentrate on the message

begin with a slow, well-prepared introduction; have a confident and clear conclusion
most important: be prepared and practice