Effectiveness and Adherence to an Online Sleep Program

Inclusion Criteria: * Age 18 to 70 years old. * Currently living in the continental United States and Canada. * Symptoms of insomnia based on the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) definition of insomnia disorder: * Self-reported sleep difficulties (including sleep-onset latency, waking after sleep onset, early waking of more than 30 min duration) 3 or more times a week in the past 3 months. * Self-reported insomnia problem for more than 3 months. * Self-reported significant daytime impairment due to sleep difficulties. * Willingness to log onto the internet on a regular basis for the duration of the study (3-7 months). * Willingness and able to complete almost daily a sleep log to track sleep pattern for up to 2 months at a time (approximately 2-3 min daily). * Willingness to be in the Wait-list control group and not have access to the program for 3 months. Exclusion Criteria: * Pregnant or planning to be pregnant in the next 6 months. * Lack of internet access and/or Mac computer at place of residence. * Currently participating or have participated in group or individual therapy for insomnia in the prior month. * Patient Health Questionnaire (PHQ9) depression score \>14. * Recent treatment (less than 3 months) or medication for depression or anxiety. * Change in treatment or medication for depression or anxiety in the past month or planned change in the next 3 months. * Current treatment (therapy, prescription) for any other psychological or emotional conditions (including but not limited to: mania, manic-depression, psychosis, schizophrenia, adjustment disorder). * Diagnosed and currently suffering from a sleep disorder (including, but not limited to sleep apnea, restless leg syndrome, sleep walking, narcolepsy) which is untreated or has been treated for less than a month. * Suffer from physical symptoms or medical conditions that may affect sleep (including but not limited to: pain, arthritis, tinnitus, diabetes, night time cough, shortness of breath, hot flashes, frequent urination, heartburn). * Steroid an stimulant use (including but not limited to prednisone, methylprednisolone or Solumedrol (for inflammatory disorders), methylphenidate, or Ritalin (for Attention-Deficit Hyperactivity disorder), Provigil (for narcolepsy), Wellbutrin or Zyban (for tobacco cessation), cocaine or methylenedioxymethamphetamine (MDMA) (a.k.a. Ecstasy)). * Irregular workshift. * Having young children who may affect sleep pattern. * Taking over-the-counter or prescribed sleep medication 3 or more times a week. * Alcoholism. * Inability to access the internet on a consistent regular basis for the duration of the study (3-7 months). * Inability to complete daily sleep log to track sleep patterns for up to 2 months at a time. * Unwillingness to be assigned to the wait-list control group for 3 months prior to gaining access to the program.