The purpose of the research work is to study how positive thinking affects the individual and its importance in maintaining the physical and mental health of the individual. The following research methods were used in the scientific work: analysis, synthesis, generalization, systematization. As a result of this research work, it was possible to reveal the essence of the term “positive thinking” in the context of positive psychology, study its origin and conduct a detailed analysis of its impact on the individual in the modern world. The study also managed to study the main areas of influence of positive thinking on the individual: cardiovascular system, immunity, addictions, and general physical tone of the body. This study covered key aspects, including the concept of positive psychology and the model of true happiness, which reflect the perception of life through pleasantness, goodness, and meaningfulness. As a result of research work, methods and techniques for supporting positive thinking were determined, which included replacing negative thoughts with productive ones, self-observation, focusing on positive aspects of life and developing an optimistic life position, which contribute to the activation of positive emotions and improvement of a person’s physical condition. The results of this study can be used in the development and implementation of effective strategies and approaches to support positive thinking of people in the conditions of global changes, as well as in the practical work of psychotherapists and social workers.