You’re well-aware of the benefits of a healthier lifestyle: less pain, more energy, more mobility and autonomy, a higher life expectancy, and so on and so forth ad nauseam. Unfortunately, this knowledge doesn’t compel you to action. Your behavior mostly follows simple hyperbolic discounting - healthy actions pay off in the future, but the future is far away, and your TV / smartphone / snack is much closer. Why Take Care Of Your Health? - LessWrong