Norman E. Rosenthal is an American author, psychiatrist and scientist who first described seasonal affective disorder (SAD), and developed light therapy as a treatment.

The Transcendental Meditation technique is the technique associated with the practice of Transcendental Meditation developed by the Indian spiritual figure Maharishi Mahesh Yogi. The practice involves the use of a private mantra, and is practised for 20 minutes twice per day while sitting comfortably with one's eyes closed. TM instruction encourages students not to be alarmed by random thoughts which may arise, but to easily return to the mantra when one becomes aware of this.