Writing for a better life

Could ‘writing’ down one’s thoughts really result in a better life? What if it could? Could saving money, result in greater personal wealth? Could ‘going’ to the gym regularly result in better physical fitness?
Could a healthier diet result in better health?
A lot of it depends on an undeterred attitude, positive expectations, a clear determination and a belief that one deserves a better life and an openness to the emotional, physical, intellectual and spiritual changes that are sure to come in the growth process.