The most inspiring TED speakers are open, authentic, and, at times, vulnerable. 
Brené Brown gave a TED talk on the topic of vulnerability and how her own research led to her personal journey to know herself. Opening up paid off for Brown in a big way. Oprah discovered Brown on TED, invited Brown to be on her show, and today Brown is a bestselling author and regular contributor to O, The Oprah Magazine.

Public speaking and vulnerability

And mastery is the foundation of an extraordinary presentation. So express an enthusiastic, passionate, and meaningful connection to the topic you are presenting in your public speech.
You cannot be an inspiration to your peers if you are inspired yourself.

Passion leads to mastery

Use humor in your speech, but without telling a joke. You will seem more likeable, and people are more willing to do business with or support someone they like.
For example, Sir Ken Robinson\ makes humorous, often self-deprecating, observations about his chosen field, education._

Humor makes an audience more receptive and less defensive

There are no bullet points on the slides of the best TED presentations. There are pictures, animations, and limited amounts of text. 
Use the “picture superiority” technique. Your audience is much more likely to recall an idea when a picture complements it.

The picture superiority method

The human brain loves novelty. 
An unfamiliar, unusual, or unexpected element in a presentation jolts the audience out of their preconceived notions, and quickly gives them a new way of looking at the world.

Teach your audience something new

TED talks are watched by more than two million times every day. They have become the standard in public speaking and presentation skills. 
So probably your next public speech will be compared to a TED talk. But having to raise your game to the TED-style is not a bad thing; adopting some of the techniques that have brought TED speakers global acclaim will make it much more likely that you will persuade your audience to act on your ideas.

Popularity of Ted talks

It grabs the listener’s attention and is remembered long after the presentation is over. 
Use anything in your presentation that elicits a strong emotional response such as joy, fear, shock, or surprise.

Deliver breathtaking moments

Stories connect us. Stories stimulate and engage the human brain.
Stories help the speaker connect with the audience and make the audience more agreeable with the speaker's point of view.

Tell stories through your presentation

A TED presentation should be 18-minutes. **Researchers have discovered that too much information prevents the successful transmission of ideas. **
TED curator Chris Anderson states that 18 minutes is "long enough to be serious and short enough to hold people's attention."

Stick to the 18-minute rule

Practice and internalize your content so that you can deliver the presentation as comfortably as having a conversation with a close friend. 
For example, Dr. Jill rehearsed her presentation 200 times before she delivered it live.

Practice your speech relentlessly

"Your mission in any presentation is to inform, educate, and inspire. You can only inspire when you give people a new way of looking at the world in which they live."

Depending on your perspective, 2006 was either a really bad year for public speaking or the start of a world-changing transformation. In that year the famous TED conference began streaming 18-minute presentations from the world's top minds for free.

Practice your speech relentlessly

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2. Believe in your abilities