Understand the conditioned responses of your nervous system.
Understand your habitual behavior and new creative responses.
Your mental faculties may be too lethargic to accept anything new.
Understand any new creative response that sometimes occurs when you are challenged.
For example you have moved to a new city and trying to locate a friend without a valid address. See how your nervous system behaves and gets tremendous energy when it finds any new clue and how it gets frustrated when it proves futile.
Let yourself experience that sustained mental activity.
Never say no if such thing happens again in future.
Million of years of man’s active engagement in facing similar challenges has been able to provide you with such an intelligent brain.
Alternatively you may experience similar bursts of energy when you are at home and working on a solution to a problem.