Experienced presenters may be amused to know what when I (Bill Ryan) stepped on to the stage to open the conference, I had prepared nothing, had no PowerPoint slides, and had no clue what I was going to talk about for two hours. I felt calm - but was really quite devoid of any plan.
However, although my mind was blank, everything felt fine - and it turned out to be a pretty good presentation. Moral of the story, go with the Force. Enjoy 🙂