A recent study in Lancet found that having a purpose for living can increase your life span. About 9,000 people over age 65 were followed for 8.5 years. Based on the results of a questionnaire that gauged how much control they felt they had over their own life, and how much they thought what they did was worthwhile, they found that those with the highest levels of wellbeing lived longer.
Over the eight year follow-up period, just 9% of people in the highest wellbeing category died, compared to 29% in the lowest category. Does your life have purpose? Or is much of your self-worth tied around your work? Are you practicing any hobbies?