The Game of Life, pt. 5: Memory

Christians are supposed to think and act differently from the rest of the world.  How we respond to adversity, our reaction when we don't get our way, how we treat others - all of these should be different from the cultural norm.  But we live, work, and go to school in this culture.  It's easy to fall into the accepted patterns, isn't it?  So how do you do it?  How do you renew your mind and not conform to culture?