At the beginning of the year I stepped back to see what things I was missing out on or what I should be doing in my life. I found a few things that I wanted to add into my life and made a few changes to make those things happen. Whether you need to find another job, make more time for someone, or time for a fun habit try to make it happen. It probably won't unless you make time for it.
On a similar note, some things that we might focus on to make us happy might be for more selfish purposes. I like this following quote that lets us realize the many great things we have in our lives and how we need to recognize that we have so much, and in many cases... enough.