If you’ve never held a microphone before, it’s possible you might find the power of it intoxicating. For this brief moment in time everyone in your immediate vicinity has no choice but to pay attention to you. If your speech is going well and you’re getting laughs, you might be tempted to start riffing; who knows when you’ll ever have this opportunity again, right? Resist the impulse. The last thing you want to do as a best man is give a speech that drags on. PT Barnum once said, “always leave them wanting more.” With that in mind, keep your speech short, sweet, and to the point.