A: Hello. You can write a good TED speech in seven easy steps:
Choose a topic you care about.
Craft your message around that topic, and keep it clear and concise.
Define a key takeaway for the audience.
Draft your TED talk as a story.
Tailor your visual aids to your audience, your story, and your brand.
Practice, practice, practice.
Remember it’s okay to show your flaws.
You can learn more about this by reading an article by Taylor Payne, "How To Write A TED Talk In 7 Easy Steps."
I hope this helps.