We have explained fifteen tips for improving your oral presentation:
Do your homework.
No one can give a good presentation without putting in some serious time preparing remarks. Many talented speakers look as if they're just talking off the cuff, saying whatsoever comes to mind. But, in reality, they've spent significant time figuring out what they're going to say. You should, too.
It's always a good idea to try out your presentation on your professor before giving it in class. Office hours work well for this.
Play the parts.
Good presentations are organized in sections. Many presentations need only 2 or 3 main points. Organizing your points into a few key parts and telling your audience what these parts are–both before and as you go through your presentation–can be the difference between a winning presentation and a loser.
Take it slow.
The single major mistake inexperienced speakers make is going too fast. Remember that your audience is hearing the material for the first time and isn't closely as familiar with the topic as you are.
If you find yourself running out of time, either drop or briefly summarize any leftover material. If your presentation includes a discussion period, gesture at the points you haven't fully covered and recommend them as things that could be discussed later.
Do a dry run.
It's at all times good to do a run-through the night before the presentation. This can help with both your timing and your manner of presentation. Be sure to make intellectual notes if you went on too long or got nervous or stuck. Some persons find it useful to have a friend pretend to be the audience: He or she can build up your self-confidence and maybe even ask a question.
It’s not essential to wear a suit, but it's hard for people to take a presentation really when you look like someone who just rolled out of bed.
Talk; don't read.
Nobody enjoys seeing a speaker burying his or her face in a script or writing, reading stiffly from a piece of paper. Try to talk from notes, or, if you use a written-out text, try to look down at it only occasionally. It's not as much of important that you capture the text word for word than that you present the main ideas in a natural and relaxed way.
For certain kinds of presentations, visual aids–such as PowerPoints, handouts, even things written on the board–can help your audience locate and grip the main points. Just be sure to explain these materials fully in your presentation: No one is happy to see an outline that can't be made heads or tails of.
Some presenters find the "speaker notes" feature useful in PowerPoint. It sure beats flashcards.
Don't bury the crowd.
Including huge numbers of quotations or unfathomable amounts of data can overcome even the most attentive audience.
As important as the content you present is your authenticity in presenting it, so don't try to be someone you're not. You'll never succeed.
Play it straight.
There's no harm in including a little humor in your presentations, especially if you can carry it off well. But in most college presentations, clowns will get C's.
Circle the crowd.
A very important part of public speaking is to make eye contact with people seated in all parts of the room–even those nodding off in the back. That shows people that you're interested in communicating with them–not just getting through this experience as quickly as possible. And it wouldn't hurt to go out from in back of the podium or desk and walk around the room a little. Sharing space with the audience can also communicate your interest in sharing your results with them, something you surely want to do.
You don't have to actually be relaxed–few speakers are–but at least try to appear as relaxed as possible. Bring along some water or a drink, take short breaks from time to time, and think pleasant thoughts. No one enjoys speakers who are trembling and sweating bullets.
Some professors throw up before having to lecture. It doesn't happen often–thankfully–but take consolation in knowing that even very experienced speakers find it tense to give a lecture.
Always be sure to have a satisfying conclusion to your presentation in which you make clear to the listeners what they now know. It creates a warm feeling in the minds of your listeners and shows them that they've really learned something from your talk—which they probably have.
Some speakers are terrified that someone will interrupt them with a question or comment. Actually, this is one of the best things that can happen, because it shows that someone in the audience has engaged with what you're saying, and, if you have the time to offer a brief response, it can actually lead to genuine progress on the point you were making. And two-way conversation (assuming you're minimally good at it) is always a tension-reducer.
Know when to stop lecturing.
Certain presentations–especially in advanced or upper-division classes or seminars–can require you to present some material, then lead a discussion. Be sure to attentively listen to any comments or questions your classmates might raise before starting on your answer. And in a discussion period, never lecture (only discuss), and be sure to answer exactly the question asked (don't offer up more canned–but irrelevant–material). In many classes, how you discuss is as important as how you present.