Participation in the study will last 4 months. All participants will first undergo initial assessments that will include a telephone interview and a face-to-face interview with a certified study psychiatrist for the purpose of confirming diagnosis. Eligible participants will then be assigned randomly to the LiveWell or TAU group. Participants assigned to either group will be provided with a smartphone and wrist-worn device, and will be asked to carry the phones with them whenever they leave home and to wear the wrist-worn devices 24-hours a day 7 days a week. Participants assigned to the LiveWell intervention will be asked to undergo a 16 week psychosocial intervention consisting of phone-based self-monitoring and educational tools to help them learn skills to better manage symptoms. Participants assigned to the TAU group will be asked to provide limited self-report data on wellness and sleep. All participants, regardless of assigned group, will be asked to participate in assessments delivered over the phone to assess presence and severity of mood symptoms.