Sometimes a speaker will end a presentation with a question and answer session. If you do this, don’t end the presentation with your answer to the last question. It might have little to do with your main point. Instead, after you have answered the last question, say something like:
“That’s all we have time for. If there is one thing I hope you will remember from this presentation, it’s…”
Doing this will end the presentation in a neat way, and pull together the strands of the previous period of time. It will also allow you to reinforce the central point of your presentation. As people leave, thank them for attending and say goodbye to them.
If people leave the presentation on a positive note they are more likely to remember what has gone before in a positive light. Whatever else you do, you should ensure that if people have follow-up questions after the event they can address them to you in whatever way is possible.