Although you probably do not have such luxuries, you can do the preparation yourself. You must take the time before the day of your speech to plan out your presentation.
Gather your notes, go over your speech in your mind, and practice. Stand in front of a mirror or front of friends or family members and simply deliver your speech.
This will help you to see where the weak points are.
If you discover that a segment of your speech is dull, this allows you to spruce it up and make it interesting. The best effective public speakers take the time to fine-tune their material (as well as their delivery) before the day of their presentation. Certainly, even Barack Obama goes over his material before a major press conference or meeting.
Being able to communicate with your audience and connecting with them is very important. It is vital to make that connection early by showing your audience that you are confident and in control from the moment you take the podium. Smiling and looking audience members in the eyes is very effective at capturing their attention in the first few minutes.
Showing that you are relaxed and approachable puts your audience at ease and earns their respect right from the beginning. Speak with a sense of authority and introduce yourself on a personal level to some degree, so that your audience connects with you. A great introduction is a key to captivating your audience in the first moments. Tossing a funny quote or a short, humorous story into your introduction can go far in making that connection with audience members.
You must have a good sense of timing in your presentation. Knowing when to pause, raise your voice, or introduce props or materials are skills that are learned with practice. Speaking too quickly or too slowly can result in your audience becoming bored or even angered, so be sure to maintain a consistent pace throughout your delivery.
Finally, learning to use the correct body language is vital. No one wants to sit and watch someone stand perfectly still behind a podium with his head buried in his notes, delivering a monotone presentation. Nor do people want to watch someone run back and forth in front of them darting here and there. Instead, the speaker who wanders a bit and uses gestures to emphasize his points is far more interesting. Stand tall and do not slouch or lean on the podium when speaking in public. This gives the impression that you are bored, lazy, and uninterested in your ideas.