In chapter 3, they discuss the different parts of the brain. As I was skimming the titles, I came across the Limbic System and it said how one of the roles was motivation. I remembered watching a video about procrastination and it involved the Limbic System.
Here is part of it:
I enjoyed the image that Charlie McDonnell painted, that there are two parts battling. For me, that is usually the case, and I spend a few moments trying to decide to do homework or watch videos (this time, both!). It is a good example of how the brain does has so many goals and often times, the end result shows who was victorious.