Public speaking is a necessity

"Would you like to be a speaker at our next conference?" the email from the organiser started.

I realise that public speaking is one of people's greatest fears; most people would rather crawl through a snake-filled swamp than to talk in front of a crowd.

But if you're a remotely successful adult, chances are you've had to speak in public at some point. It might be a sales pitch to a customer. It might be an internal presentation.