#37 We don't know what we don't know

Over the years David has competed in some unusual and different areas. This has included the World Memory Championships and the Over 50s British bodybuilding finals.

As a professional speaker, he has also spoken to hundreds of thousands of people in 25 different countries.

But whatever the endeavour, all the practice in the world has not come close to the experience of actually putting himself in the hot seat and doing it for real. To be a presentation rockstar, you must do the same.