Tell clients what you’re going to show them before you show them. Set their expectations so they’re not wondering about where your presentation is going. If you have three ideas, say so. If you’re covering various media, say so. If you have something extra or unexpected, say so. “T0day, we’d like to show you three ideas, each covering television, social and print. Along the way, we also have a couple of surprises that we’re excited about, as bonus thoughts.”
You’ve set the client at ease about what you’re showing and how much. Now the client can forget their mental laundry list and focus on you and your miraculous ideas.