HealthTriangle.org lists the three aspects of the health triangle as social health, physical health and mental health. They say that while most people understand the importance of physical health, mental and social health are more likely to get overlooked.
AZCentral recommends volunteering and joining social clubs as a means of improving social health. For improved mental health, they recommend learning healthy ways to deal with and communicate anger and frustration. If mental health issues such as depression are a factor, it is important to seek medical help. A primary care physician can prescribe medication and refer patients to therapists for more comprehensive treatment.