Dr. Harlim taught us a trick to prepare a presentation. No matter how long your talk is, prepare the presentation as if you only have five minutes. The presentation, therefore, will only cover the core of your topic. Base on the five-minute talk, extend it to a ten-minute talk. What will you include? Repeating the procedure, we can have a thirty-minute presentation, an one-hour colloquium, or an entire semester course.