I actually found this on boingboing.net. I shouldn't even post their name since they're one of the few big aggregating sites that has never run one of my articles. But hey, when they've got a good article, they've got a good article.
They posted This MP3 about how to always do the right thing. It's brilliant. I've actually been wanting to write a post to that effect, but the speaker, Dan Gilbert, did a much better job than I would have.
The essence of the speech is that EV is king. EV is expected value, a term used commonly in the gambling world. I would explain what it is, but if you listen to the lecture you will have a better understanding and then I won't have to type as much.