This page cannot exchange them, but it does briefly note a few issues that I most frequently see in talks.
Bring opinions by providing a practise chat! Very effective ways to increase job is observe the responses of people to get their unique a few ideas and advice.
Think about the presentations you go to (or bring went to in earlier times), particularly if they have been close one way or another to yours. That which was dull or boring regarding more presentations? What was interesting about all of them? Exactly what do you eliminate through the speech? What might you have advised people towards subject, a half hour after the end of the presentation?