A thing that I'm realizing more and more is how few presentations are one-offs; that is, when you're developing a presentation, it's actually going to become part of your repertoire, and you're going to be able to use it again and again. Convention and conference speakers certainly reuse presentations, but the same applies to entrepreneurs (to investors) and employees (to senior stakeholders).

Rehearsal and practice became more palatable to me once I came to see individual presentations as permanent fixtures in my professional archive of works.