Worrying about aging and death is a waste of time. They are beyond your control and are inevitable.
Rather focus on living heathy, this contributess to aging gracefully. Jettison unhealthy addictions and replace them with daily routines that increase longevity.
Taking every great opportunity that comes your way eliminates regrets from twilight years. It is better to try and fail than to fail to try. Failing after giving your best shot leaves you with a sense of comfort. Such that when retrospecting, you wouldn’t feel any pangs of regret. Rather, it would be a feeling of exhilaration because you would realize that you ran a good race.