Ashok, a mid-level manager and new presence and presentation coaching client, shifted uncomfortably in his chair. “The problem,” he said, “is that in order to be promoted at my company, I need to be able to speak confidently in front of larger and larger groups. But even though I keep being offered opportunities to do it, I turn them down because I’m just so uncomfortable speaking in public. Last week, my boss suggested I give a presentation at a conference that’s coming up, to gain some visibility and credibility. But I found a way to squirm out of it, like …