What can go wrong?

The speaker may drop you an unreadable presentation five minutes before it comes out. Be prepared to move the presentation on the schedule, and in the meantime find someone who will work with the author to bring the presentation to a better look.

The speaker didn’t show up. It’s good if you find out about it 15 minutes before his presentation. Same trick: Move above the other speakers, or announce to guests that there will be more time for networking.

There will always be things that get out of hand. Try to accept that, give up early – there’s plenty more to do.