Dan Gilbert has a great talk on TED about making bad decisions. Though he doesn't call it a discussion of "utility" and cognitive biases in decision making, that's what it is. If you've read Daniel Kahneman's stuff, or the excellent book "Against the Gods", you will recognize Gilbert's points immediately.
However, even if you are familiar with all of this stuff, Gilbert is very entertaining and his examples are quite illustrative and easy to identify with. His main talk is given in 24 minutes, and then he answers questions for 10 more.
Give it a listen and look:
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