http://www.Awake2000.com Nightly affirmation device offers better results for affirmation users. Many users prefer nightly affirmations claiming they are better than daily affirmations. ThoughtDr
M. Marschollek, A. Rehwald, M. Gietzelt, B. Song, K. Wolf, and R. Haux. MEDINFO 2010 - Proceedings of the 13th World Congress on Medical
Informatics, volume 160 of Stud Health Technol Inform, page 68--72. Amsterdam, IOS Press, (2010)