It requires a little effort to be social, but the rewards can change your life: find a life partner, new business opportunities, a better job, new friends, good deals, ... When was the last time you invited your neighbors for a drink?

Try and build up a network of positive friends. The more positive people you surround yourself with, the better you will feel. The best friends are those who are unafraid to tell us when we are acting foolishly or selfishly.

An easy way to build up a network of (old) friends is to use facebook.com where you can search any name of any person and see if they are already in Facebook. If they are not yet, you can suggest them to join as well. The site is relatively new, but there are already tens of millions of "faces" on it.