How Gratitude Can Change Your Life by Marelisa Fabrega:

According to research study by two psychologists, Michael McCollough and Dr. Robert Emmons, found that practicing gratitude resulted in higher reported levels of alertness, enthusiasm, determination, optimism, and energy. Also, those in the gratitude test group experienced less depression and stress, were more likely to help others, exercised more regularly, and made greater progress toward achieving personal goals. Thus, exercising gratitude practices in our daily life has positive effects on our overall health and well-being.