Public Speaking

1) How can speakers develop introductions that interest audience members enough to make them listen to the entire speech? What clever strategies can you think of?
2) Of the three factors of credibility, which do you think is going to be hardest to establish with your peers during your next speech? Why? What can you do to enhance your peers perception of your credibility?
3) What elements are essential in the conclusion of a speech? Why are these elements essential?

Three separate short answers please