Combining morning hydration, bright light, cold exposure, caffeine, and exercise with evening dim lights and physiological sighs has the greatest effect on daytime mood, focus, alertness, nighttime sleep, and overall stress levels.

“The reason I confidently say best here is because this combination will have the greatest outsize effect on daytime, mood, focus and alertness and nighttime sleep, and overall levels of stress, and as a consequence, long-term benefits have done consistently.”