I am in the process of (adio) reading The Chimp Paradox by Dr Steve Peters. Dr Peters is the psychologist for the British Cycling Team and has apparently been instrumental in Team Sky wining so many bike races including the Tour de France last year.
The book breaks the functioning of the brain down into 3 parts: the human, the computer and the chimp who seems to be responsible for many undesirable characteristics and behaviours. Basically, if we want to be happy and successful, then we need to learn to manage our inner chimps and not let them wreak havoc whenever they feel threatened or scared.
It's a great book (adiobook in my case) and I heartily recommend it for anyone who occasionally finds themselves behaving in a way that they later come to regret or who wonders why they do things that, even at the time, they know are stupid and irrational.