Guidelines for preparing a good presentation:

1. Speak to inform, never to impress. Just tell them what you have learnt.

2. Corollary of 1, is that you must well understand what you are speaking
   about. You must have something to tell. In fact, you should be willing
   to debate someone on this topic.

3. Know your audience. You can assume they know something only if you know
   they know it.

4. Divide your talk into sections as you would divide a story into chapters.
   Think what each section needs to say to convey the final message and how
   each section leads to the next.

5. Try to present the high level ideas, intuition and explanation mostly.
   Skip minor details. Even where details are important to the understanding,
   preface them with a general explanation. Sometimes it is OK to relegate
   the details into "extra slides" section to explain if someone wants to
   know more.

6. Tell them what you will tell them, tell it and then tell them again what
   you told them. Not a bad idea to show the outline in the beginning and
   remind them each time you move to the next part of your talk

7. Prepare slides so that you spend an average of one minute on each slide.
   So about twenty slides for a twenty minute presentation is about right.

8. Remember a picture is worth a thousand words. For each slide ask yourself
   if a picture would convey its content. Do not crowd any slide. Slides
   should convey only the essential information.

9. Use colours to differentiate things of different types. Do not use colors
   just because you can. Animations are even better than pictures if they
   demonstrate a procedure.

10.Never read off the slide. What is spoken along with the slide should
   interpret, elaborate or explain what is on the slide.

11.It sometimes helps to write out your entire "speech" once. You can also put
   salient points you want to make in the "notes" field. Use presentation mode
   to have access to your notes as you speak. Again, DO NOT READ OFF THE NOTES.

12.Maintain eye contact with your audience. Remind yourself to look at all
   sections of the audience.

13.Practice, Practice, Practice. Start with a longish talk with several detail
   and then cut the depth until you fit the time budget.

14.In general, better to be too slow than too fast.

15.Try to not "lecture to" the audience but "chat" with it. This will also
   ensure you modulate your voice appropriately and put emphasis on the right
   parts.