If you're new to TED, these are the talks you should start with.
Hilarious story-telling contains an irresistibly inspiring message.
http://www.ted.com/index.php/talks/ken_robinson_says_schools_kill_creativity.html
The science may be simplified, but the story is astonishing and uplifting.
He can transform your understanding of the world with a single 18-second animated graph.
His ingenious psychology experiments prove that humans are terrible at predicting their future well-being.