Happy

Once we've lived a while we realize that no new thing is going to make us happier. No new purchase, relationship, trip or promotion will add to our overall long term well being. The reason for this is that our sense of contentment comes from inside of us and we are the only ones who can influence it. 

This is something I learned the hard way as many of us do but there is a bright side in that once we understand this fact we can work on our sense of self and live more simply with less distractions. We don't need to chase things that the rest of the world seems to covet.