Remember that when you give a speech or presentation, you are the only one who knows what you have planned to say. Why is this so important? If you forget to say something at the proper time in your outline or leave out a segment of your program, no one knows but you. You can include it in your continuing presentation or make any correction you feel comfortable with and no one knows but you. So relax and concentrate on your presentation. Your audience seldom has an outline to check you on. As long as you get your point over you have been successful. If you react visibly or audibly to some perceived mistake it will be projected to your audience and then they will know you made a mistake. Be well prepared, know your goal and allow yourself to make changes during your presentation; because no one knows but you.