It's tough to achieve a balance between healthy ambition to improve and nagging dissatisfaction and restlessness. I'm not in anybody else's head, but for me it's about matching my values to my reality. I pursue the things I value and value the things I have. Religion and culture have made things easier for me, I guess. Where I'm from, the things you've already achieved are a good life's work. (I guess that, and visiting your mom on a regular basis.) My parents are happy with me and I'm able to support my kids and everything on top of that is icing on the cake.