Seth Godin explains the atomic method of creating a Powerpoint presentation:
The typical person speaks 10 or 12 sentences a minute.
The atomic method requires you to create a slide for each sentence. For a five minute talk, that’s 50 slides.
Each slide must have either a single word, a single image or a single idea.
Make all 50 slides. Force yourself to break each concept into the smallest possible atom. If it’s not worthy of a slide, don’t say it.
Really cool, and it eliminates the need for slides full of bullet points. The audience’s attention should be on you, not the slides.