Those moments in life when you are most fully engaged have a common element — you  let go of all concerns, resentments, and thoughts of yourself, says Yale psychiatrist Dr. Judson Brewer.

Athletes call it being in the flow, notes Brewer, assistant professor of psychiatry and medical director of the Yale Therapeutic Neuroscience Clinic at the Yale School of Medicine. He believes that its power can be harnessed. 

In this TEDx talk, Brewer asserts that people can improve their performance and even quit smoking through a technique called neurofeedback.