There comes a time when you have to make the things you've studied your own. You've collected all the facts, stats, graphs and flow charts. These things can support what you have to say but in the end it's still up to you to make the case. What people want to hear is your voice; your take on things. The more complicated your subject matter, the simpler you should be. The more straightforward you are in your presentation, the more inviting you become. Do this and you'll win people over to your way of thinking. Who knows? They may even want to come back for more.