Use the below link to watch video of a author David Brooks speak about some interesting human behaviors and psychological traits.  You only need to watch the first 30 minutes of the 60 minute long video, because the rest is just him answering not-so-interesting questions from the audience.  For me, some of the highlights from his talk include:

Are you struggling on how to choose between two choices?  …let your unconcious mind play a bigger role in the decision, and leave it to a coin flip.  Get a coin, assign each side of the coin to one choice, flip it, and let the flipping of the coin tell you how you should choose.  Do this by listening to your reaction to the outcome of the coin flip, not the actual result of the coin flip itself.”

Research shows that new born babies who do not receive hands on care (the physical touching from nurses and parents) are more likely to die than those who do.  This reflects our innate need to feel emotional connections to other people.  We are social beings.

http://booktv.org/Watch/12314/The+Social+Animal+The+Hidden+Sources+of+Love+Character+and+Achievement.aspx