Good article; http://abnormalreturns.com/2016/07/14/a-rational-response-to-a-seemingly-irrational-world/
The more I read and experience the more I feel it's your mindset which is so crucial in actually succeeding in reaching the goals you set yourself. That is perfectly easily accepted in relation to sport, the will to win, the focus and drive, but in investing even more so because so much, in fact, pretty much 99.99% (as an individual investor) is out of your control.
"Everyone has a plan until they get punched in the mouth" M. Tyson. The market will punch you in the mouth most years, how are you going to handle it?