I just watched this video all the way through and cannot recommend it highly enough. John Cleese gives a speech on creativity which includes references to psychological findings and easy, applicable steps on how to be creative, and what you need to do to get yourself into a creative mindset. My friend Stephen E. Kennedy shared it with me.
As a songwriter and a Psychology student, this topic of research is particularly fascinating to me - I actually wrote an essay on creativity last year. Unless you are one of those people who can't listen to a song all the way through on your Ipod, watch the whole video because it will be valuable to you in many different aspects of your life.