The shorter the preparation time frame, the more critical it is to take a few minutes to focus your thoughts and plan how to use your time. Get the audience's attention with high-impact graphics. Your design must be sufficiently appealing to hold your audience's attention long enough to communicate your message. Avoid software templates with generic backgrounds. Canned backgrounds undermine the sincerity and originality of your message.
Contrast is essential for type legibility.
Use phrases rather than full sentences. Empty space is essential to balance the amount of information on a page. Having a proper balance can greatly improve the transmission of your message. It can be done, but you may overwhelm your audience with too much information. Anything less than 18 point type will usually be illegible to an audience.