Start with the room
Name the people who will be there, what they already know, and what they need to understand, feel, or do next. That creates a more useful purpose than simply trying to sound confident.
From there, choose the few ideas the audience needs to carry with them. A clear throughline makes it easier to decide what to include and what to leave out.
Shape evidence and visuals around the point
Choose examples and evidence that move the audience toward the decision or understanding you need. Use visuals when they make an idea easier to see, not as a transcript of what you will say.
Build transitions that explain why the next point follows. They help the audience stay oriented and give the speaker places to recover if the conversation shifts.
Rehearse the exchange
Practice the opening, the difficult explanation, the likely question, and the close with another person when possible. Ask what they understood, where they wanted more context, and what they remembered.
Prepare brief notes instead of a memorized script. When a speaker can return to the next point, they have more freedom to listen and adapt in the room.