Healthy sleep hygiene practices are a necessary but generally not sufficient part of insomnia treatment. They are also an essential part of a clinical inquiry into sleep difficulties. A recently published Sleep Hygiene Practice Scale (Yang, Lin & Hsu. 2010. Hygiene practices in good sleepers and patients with insomnia. Journal of Health Psychology, 15, 147 – 155) is very helpful in this inquiry. It is made up of 30 items related to daily living activities and sleep habits that may have negative impacts on sleep. The items are scored on a 6 point Likert scale from 1 (never) to 6 (always), and are clustered in 4 domains of sleep hygiene: sleep schedule, arousal, eating and drinking habits, and sleep environment. This gives the insomnia clinician some numbers to include in their assessment report, and the article has some preliminary norms for insomnia patients and normal sleepers. But for me this scale is most useful if it is completed prior to the initial interview and reviewed with the patient as a part of the interview. Any item that is scored 5 or 6 is worthy of clinical inquiry and will likely be part of a comprehensive treatment plan for improving the quality and restorativeness of sleep.