I'm surprised that most of these answers are individualistic. I'm 48, so not really the target respondent, but I've got this to say: getting old is not about me, it's about what I have to give to my wife, my children, my colleagues, my church, and my community. I have faith I'll get what I need back from them, when I need it. For now, I'm investing in my future by investing in those around me.