Been doing it for some time and seen in work, then somehow dropped the technique. This is a great reminder. And no less entertaining than "feeding the hippos" talk we saw a month ago.

 http://www.ted.com/talks/amy_cuddy_your_body_language_shapes_who_you_are.html

 http://www.ted.com/talks/robert_full_learning_from_the_gecko_s_tail.html

Erin McKean redefines the dictionary.The TED talk given in 2007.
More is on the Erin's blog: http://dictionaryevangelist.com

The other three that I watched recently were not worth mentioning.