1. "I know I'm all over the place."
Do not own that! Do not give voice to or breathe life into that kind of assessment of your presentation. When you say this, you make it clear that you know you have let down your audience; you know you have not done the best job you can to facilitate a positive experience for your audience. Furthermore, if you know you can be "all over the place" when facilitating a presentation, training, or demonstration, then be proactive; take a minute to craft an agenda or a quick list of headlines beforehand, and follow them. It does not have to be anything fancy or elaborate.
Here’s what I mean: You already know what you plan to cover, right? All you need are ...