Do you enjoy your work, or are you in it just for the money or the status, or because you “can’t find” something more enjoyable to do ? Do you enjoy your life, or are you in it just because you have to, the alternative being too scary and stigmatized ?
This post by Jacob Sokol presents 12 areas where people who are satisfied with their being act differently than those who are not.
Sound advice IMO.
See also this post for more research on the same theme.
[thanks to Iain for the pointer!]