You probably hate giving presentations; you probably hate listening to them too. Why? Because most business presentations are too long, too detailed, too boring, and submerged under a blizzard of PowerPoint. But the single most important presentational tool known to man isn't a slideshow; it's you. Whether you're speaking to one person across a table, 20 people in a boardroom or 1,000 people in a ballroom, it's all about the words you say and how you say them.