Well-being therapy is one of the relatively new interventions that used to achieve optimal and balanced functioning in certain dimensions of the individual. The aim of this study is to determine the effectiveness of well-being therapy applied in several contexts and in different age categories. Review was conducted in 14 studies based on inclusion and exclusion criterias. The results of the review indicate that well-being therapy can be carried out in the adult and student age categories, affective disorder and addiction cases, as well as preventive and curative treatments. Well-being therapy will also achieve maximum results if combined with with CBT treatment. However, there also need to consider about the number of sessions and the duration, and the severity of individual disorders so that the client can follow all the therapeutic process.

Quality of Life is the viewpoint or perspective of individuals regarding how good their currently experienced life is. In later adulthood (old age), there are many changes, such as changes in physical and cognitive abilities, and also changes in social roles and emotional conditions, especially on elderly women whose husband or spouse had passed away. This condition can affect the Quality of Life of such individuals. The goal of this research was implementing the Life-Review Intervention, which was reviewing the individuals' experiences since childhood to late adulthood using the recall, reassess, reevaluate, and reintegrate processes to increase the Quality of Life of the participants. The participants in this research were two elderly widows of 54 and 63 years of age, living in East Java, who had been widows for around two years. The research method used was experimental research with single case A-B-A design, with the Quality of Life measured using the World Health Organization Quality of Life (WHOQOL-BREF) questionnaire as the main data, alongside interview and observation as the supportive data. Assessment results showed the participants having the typically negative Quality of Life on physical and psychological aspects while having the typically positive Quality of Life on social and environmental aspects. Interventions results showed that Life-Review Intervention guided individuals to reflect on their life experiences by remembering positive experiences and viewing negative experiences from different perspectives. As the result, the two participants were able to increase their physical and psychological quality, though the social and environmental aspects tended to be stable.