Inclusion Criteria:  Adult patients with NYHA class I, II, or III HF. Suboptimal adherence to health behaviors. This will be defined as a total score of ≤15 on three Medical Outcomes Study Specific Adherence Scale (MOS) items regarding diet/exercise/medications.  Exclusion Criteria:  Cognitive deficits impeding a participant's ability to provide informed consent or participate, assessed via a 6-item cognitive test. Medical conditions likely to lead to death within 6 months. Inability to participate in physical activity due to another medical condition (e.g., arthritis). Inability to read, write, or speak in English. Current participation in another intervention or program that has been designed to promote well-being or health behavior adherence.