Always remember that value is a combination of the what and the why. What you want must be combined with why the audience should do it. You get what you want only by connecting your needs to those of your listeners.
With apologies to Sun Tzu: Know your audience and your stuff, and you will never be in peril in a hundred presentations. When you are ignorant of the audience but know your stuff, your chances of winning or losing are equal. When you are ignorant of both the audience and your stuff, you are in peril in every presentation.