I have heard several in recent day talk about the center of their lives. "Finding the center" for some means moving into a place of peace and serenity. For others their lives are centered on spouses, kids, jobs, hobbies, etc.
The easiest way to figure out what the center of your life is to think about what you are consumed with. What is that your life is being spent on? Where is it that your free time goes? What is it that if it suddenly dropped out of your life your world would seem meaningless and empty? When you begin to answer that question you are figuring out what the center of your life is.
This is a critical question. Because what your life is center on will determine the direction of your life. If you life is center on your spouse then you will do everything and anything to please them. In some ways that is good but to be honest, every person will disappoint at sometime or at some level. Centering my life on my spouse makes the center of my universe which is will ultimately lead to disaster.
I could build my life on my job. I see people, and am sometimes one, that merges what I do to who I am. Excelling at my job is important to me. The problem is that I will never be "on top". There are and will always be someone better, faster, smarter, and more handsome (I know it's hard to believe!) then me. So if the center of my world is my job then I am headed for disappointment. And after my working days are done all I have is memories of the "good ole days".
If my kids are my center then life is good now. I can spend my days running them around, giving them the things I never had and always wanting. I can make sure they relive my glory. But the problem is that they ultimately will leave the nest. Even as good as our relationship can be we will have disagreements and differences. And when they leave the center of will look like the center of a donut.
So what is the center of your life? Let me suggest to a book to read. 
C. J. Mahaney has written a great book that reminds us as followers of Christ our life can not be centered on spouses, kids, or jobs. The only center that is worthy of pursuit is the cross. This is the premises and pursuit of this book. It is a short but powerful look at a life that is centered in our salvation. It sees the cross not just as piece of jewelery or some thing to be looked to a salvation alone but it becomes the thing around which our life revolves.
If you have read it I would be interested to hear your thoughts. If you haven't read pick up a copy and dive in. A few are available in the office. Or you can order it from an online retailer.
Andy