I hope you use at least a small part of your time on the interweb learning stuff.  It's just so much easier to watch a five minute video with a great teacher than trying to digest some dry textbook.  Some of the smartest and most interesting people on the web are on the "Big Think" channel on YouTube.  You'll see everything from physicists to magicians and even Henry Rollings telling you about cool stuff.

YouTube

This video sets up two moral dilemmas and it shows that there are situations where even psychopaths can "outperform" regular folks in certain situations.  So the question you need to ask yourself after this is over is, "would you push the fat guy over the rail"?  If you get a couple minutes check out the video.