Variety is the spice of life they say, use lots of different analogies, different words, different themes. Be far-ranging, wide-ranging, extremely broad. It’s up to them to pay attention and to follow. They’re the audience. You’re just giving your speech.
‘What’s the big idea’ is the theme behind all TED and TEDMED talks.
What’s the big idea? What’s the big theme? What’s the big call to action? Say one or two things, maybe three maximum, and then let them absorb it. You’re trying to trigger action. You’re trying to change behaviour. You’re not trying to have an essay – spoken.
What’s your big idea? Tell that and then leave it alone.