Well first you must model your presentation: should prevent the introduction and constant surprises the public.
It is important that everyone who attends can see it and hear our presentation and communication skills needed much say the public should have the feeling that we have tried at least once.
Please support our visual presentation is clean, clear and understandable: most graphic as possible. Remember you the rule "four to four": ie four lines of four words or less.
Letters clear and simple outline of a body large (at least 24) never smaller.
Images very significant: the presentation must accompany our speech, not replace it.
A start clarifying what we do, where we do a sequel and a short summary to say that we have done.
No eternal slides, (could be a good time about 30'' for each one).
Always some clues to know at what time of the presentation we are, and ...
First, is not a good ideea to think to make a nice presentation. I think a good presentation start from the ideea of talking, willing to communicate something to people who are in front of you. You have to believe in what you are presenting, you must have passion for the ideea you are presenting. Otherwise the audience will not follow the ideea you are presenting.
I recommend TED conferences as a model for presentation.
Everything on your PPT slides should be clear enough and should go with your presentation. Communicate with your audience not the screen. No repetitions please, be bold and fluent with your speech.
1. First, You have to know your story or material very well. If you are not very used to public speaking, then I would suggest you to write the script. Then you read . memorize them.
2. Practise it with your slides. (usually . slides for academic conference should not exceed 15 slides. total time should be 25 minutes,, plus 5 minutes of Q&A session.
3.Your bullet points on each slide should not be more than 3-4 points.
4. Practise even the part of introduction of yourself , pretending that this is a real one and you are talking in front of lots of audience.
5. Make sure all the visual , audio equipments are in good condition!!! Very important!
Probably is not something new for most of us but I think that it must be establish, from the beginning, who`s the first on the line: the presentation or the the orator. If it is about a scientific or didactic presentation then the most important are the data and their accuracy (describing by using few but key written words, doubled with a good speech). When you present a project or you must to persuade somebody then you must use "the rule of seven" (no more than seven rounds with seven words on a slide) and be very fluent.
I agree with the above! In addition I think visuals are important to include on a PowerPoint/Prezi presentation to break up the written word, include creativity, potentially awaken the audience, appealing to folks with different learning styles.