Bipolar disorder is a severe and chronic mental illness that significantly increases mortality and greatly impairs functioning. Despite the use of pharmacological treatments, multiple acute episodes, long episode duration, and significant inter-episode sub-syndromal symptoms are common in patients with bipolar disorder. As a result, patients with bipolar disorder are symptomatically ill about half the time. There is clear evidence that the addition of psychotherapeutic interventions to medication management improves treatment outcomes, yet only about half of bipolar patients receive combined treatment. Current therapies also have limitations in terms of: 1) reliance on subjective patient self report and 2) difficulties in identifying warning signs of impending episodes. Furthermore, direct measurement of observable daily patterns of behavior is not routinely available, even though alterations in sleep and activity are core symptoms of bipolar disorder. Improving access to and long-term engagement in psychosocial interventions is needed to substantially improve treatment.