“Self Discipline”
There are many important qualities that can contribute to a person’s achievements and happiness, but there is only one that begets sustainable, long-term success in all aspects of life: self discipline. Whether in terms of your diet, fitness, work ethic or relationships, self discipline is the number one trait needed to accomplish goals, lead a healthy lifestyle, and ultimately, be happy. According to a study by Wilhelm Hoffman, people with high self control are happier than those without.