Setting Boundries

I had a lengthy conversation with a peer yesterday about life and work and how does one set boundaries in the midst of it all. I have to say that this was an easier discussion when my children were home and I made time for them and their many activities. But as they have grown up and gone off to college I find myself less sure of where the responsibility stops when it comes to work. It is just so easy to continue to add one more thing to the list of things to do without ever taking anything else off the calendar.
Now I have to say that I don't mind or resent giving 60 hours a week to the church. I know there are many people who work 40+ hours at their jobs and then give another 10 -20 hours to the church on a regular basis. So I don't expect to only work 40 hours, part of my week is time, energy, personal resources that I give to the church because that is just what one does just as a member of the church gives to the work of the church beyond their work and family commitments. But the question still remains as to where and how do I make time to leave the church and all that goes with it to put some distance between my responsibilities and who I am outside of being a pastor.
I don't have it all figured out but I'm at least thinking about it, praying about it, and looking for advise.