Practicing allows you to discover problems before they matter. Be prepared for devastating equipment failures and audience disinterest. Then, if things go better as you present, you will feel confident with your level of preparedness. Introduce, substantiate, and summarize . Tell them what you are going to tell them.
Oral communication limits the pacing of the audience s exposure to information.
A thorough introduction to the ideas you are presenting helps the audience to keep up with your pace. Important ideas should be supported with data or examples. Here, visual aids can be very effective in giving the audience a clearer understanding of what you are saying. Tell them what you told them. Talk to the audience, not at them.