How to protect your presentation
Build your statement on arguments, but not on slides. Even if your presentation is well-formed, that is, visual elements are well combined with the text, you still do not need to maintain your protection strictly in the text of the presentation. You must accompanypresentation of own arguments, theses and conclusions, which do not contradict the content of the work. Never say "go to page 7", instead use: "This problem is solved on page 7".
Prepare for the performance. It is important that your speech be rehearsed several times, as well as timed. Do not prepare for the last night, the audience will easily notice this, because not everyone can compensate for unpreparedness with sincerity and excellent improvisation.
Do not forget that the audience - it's living people. During the time for which the presentation is designed, the presenter should make the audience believe him. If you can not please the audience, then all the time was wasted.
Even if you yourself are not sure about what you are telling, never show this audience while protecting the presentation. Your voice must have a conviction of what you are doing.
Nobody is protected from surprises. Carefully check the laptop, charge the battery, the working capacity of the projector. It is best to come to the meeting in advance and qualitatively prepare.