I was once told that one big difference between Americans and Europeans is that Americans live to work, while Europeans work to live. While there's probably just as much bull in that statement as any other, there's also a kernel of truth. My father said that when I come to the end of my life, one regret I probably won't have is "I wish I had spent more time at the office."
I just thought about this because I feel like I spent the week busily working away, then came to the end and had very little planned for the weekend. I'd like to balance things out a bit more, put the same value, if not more, into my life as into my work.