Haste Makes Waste Don't rattle on too fast. Underscore with changes of voice level. Be interesting in the way you sound. Don't mumble, ramble, rattle or drone. Speak as you would to an audience of one.
Some people benefit by practicing to themselves.
Practice what you plan to say slide by slide. Confidence Remember, these are the same people you talk to every day, and that you come into the room knowing more about your own chosen subject than anyone else in the room. Stay in charge. When you have finished the major part of the preparation, write your abstract. The abstract should summarize concisely what the seminar is, not what it will be.