When the environment gets cold and frosty around you, it is definitely optimal.
Immerse yourself in music, as nothing improves the mood more than a great listening session. Forget the worries of the day and the constant stress from spouse, family and job. It beats alcohol and is better than any drug in existence! Descend into the cave and return re-envigorated - with all the more energy and patience to help those around you.
....Zen and the Art of Audio System Maintenance