Start With an Empty Box « UX Crank
Instead, for every slide you create, assume it should be blank. Even better, assume that no slide exists. Start from nothing, asking yourself why the slide needs to be created. Then for every element you add ask yourself, in as snotty a tone as possible, why that element absolutely has to be added.
Each slide you use should be a complement to your presentation. If your audience is getting their primary info from the screen then they’re not getting it from you in which case you have to reconsider why you’re using a presentation to distribute your message. Maybe a poster, or a memo, or a report would have been the wiser choice. Effective presentations are all about the presenter.