This is my hints and observations after attending a one day ITIL awareness session and saw many speakers at the same day.

1. Don’t ever joke or even smile. Be very serious. People expect being very serious.
2. Don’t read slides. You are expert in the area of presentation, isn’t you?
3. Keep a distance between you and the audience. You are the teacher and they are the students, at least in this session. Don’t let them feel your are friends or you are their servant.
4. You are educating your audience. You many even challenge them by questions to keep them awake.
5. Asking questions should be at the end only.
6. Don’t ask after each slide, “Is it OK to move to next slide?” Move on, you are the teacher. Some attendees are not prepared enough to follow you, you can’t slow down much for them. The other good guys will suffer.
7. Use attractive images from nature and may be human pictures, of course if related.
8. Use wisdom quotes. It will inspire people.
9. Don’t ever show you are tired or disappointed. Be very confident and serious. If you feel that, show the reverse.
10. If you are asked to give them the presentation (i.e. PowerPoint presentation file) (and there is no problem). Give it to them but let them feel a favor. I mean, let them feel they are getting a valuable asset.
11. Don’t ever slow down. You should move on to keep the flow of conversation. and to keep time. Keeping time is your own responsibility. Everyone will blame you if you did not.
12. Don’t ever give a speech in a subject you feel you are not expert in it.
13. You own the slides. Even if prepared by someone else, you must tailor it, practice it and test yourself before the training session.

My hints focused on giving training or session to strangers that most of them you are seeing them the first time. Many of these points are not applicable to in-house sessions/training where everyone know everyone else.