Be respectful of yourself and others but loosen up and show a personal interest in the topic and the audience. Being a nerd is out of fashion. Integrate references to the audience, to people, and to yourself where doing so makes the audience more comfortable or reduces the intimidation that people might feel from the technical details. Use fiction and fantasy sometimes to help people get the general feeling for the context of a problem. You might cast the opposition as Darth Vader and your consultant as Hans Solo if the audience is familiar with Star Wars.
People can remember a story easily.
If you describe how an investment project will pay off as part of a story, it will be easier to remember later.