“Learning how to think" really means learning how to exercise some control over how and what you think.
It means being conscious and aware enough to choose what you pay attention to and to choose how you construct meaning from experience.
Because if you cannot or will not exercise this kind of choice in adult life, you will be totally hosed.” 
― David Foster Wallace, This Is Water: Some Thoughts, Delivered on a Significant Occasion, about Living a Compassionate Life