The leader knows that, to do the job properly, there are a series of mindsets within which he or she must enter. It is essential to match work type to mindset. It is also essential to be on guard against trying to do the right work in the wrong mindset. Your circadian rhythm is an important part of understanding your flow. The leader who performs the appropriate work type within the appropriate mindset experiences what positive psychologists call “flow” (a much-coveted state of high performance). The effective leader achieves “flow” as the norm, rather than the exception.