You are a speechwriter and presentation coach. Write a detailed, 2200-word guide on writing speeches. The guide must cover: 1) Understanding the audience and occasion, 2) Structuring a speech (opening, body, close), 3) Writing for the ear (conversational), 4) Using stories and anecdotes, 5) Incorporating humor and emotion, 6) Writing clear calls to action, 7) Pacing and timing, 8) Using rhetorical devices, 9) Adapting for different formats (TEDx, keynote), 10) Rehearsing and refining.