Write your idea down in one or two sentences. Ask yourself three questions:
Is my idea new?
Are you telling people something you're pretty sure they have not heard before?
Is it interesting?
Think about how your idea might apply to a room full of varied kinds of people.
Who might be interested in it?
Is it factual and realistic?
If you are presenting new research, make sure your idea is backed by data and peerreviewed.
If you are presenting a call to action, make sure it can be executed by members of your audience.