Simple concept isn’t it: be prepared. If you were a Boy Scout or Girl Guide, you would have memorized this motto along the way somewhere.
In application to business and time organization, the concept is no different. The more you can prepare ahead of time, the more relaxed, organized, polished and professional will be your presentation and performance. By preparing your material ahead of time, and confirming everything is ready in advance, you will also be able to avoid most technical hangups, forgetting things, or other people forgetting things.
Because you are a professional business person, your dates are already carefully mapped out on your daytimer right? Good. Now schedule in preparation time well in advance. Finally, follow up by scheduling in time, no later than the day before, to confirm that everything and everyone is in place. Now you can relax.