Last is First – The Summary/Conclusion Slide
 One researched "fact" of presenting that has been around for a while is that most people attending a presentation will "remember" no more than five key points.
 What you have to determine is what are the key points.
How do you get your audience to remember what you want them to?
 Start with the last slide.
 When you are ready to create your presentation, forget the details for a minute, forget the presentation's organization, instead:
 Write out your conclusion or summary slide first! It should emphasize the most important points you plan to make.
 Once you have visualized those points, it's relatively easy build your presentation around them.