The first step in the Extreme Presentation method for designing a presentation is to identify the communication preferences of the different personality types that are likely to be in your audience.  I like to use the Myers-Briggs Type Indicator for this.  For example, your audience will contain Introverts, Extraverts, or (most often) both.  Introverts need some kind of pre-reading--they need to be thinking about your material in advance.