advice from an old mentor...
Take care of:
1 - Your health
2 - Your family / relationship with God
3 - Your work
The advice was given to me at a time when I was working 100 hour weeks. I was told that even a 40 hour work week is unacceptable if I don't take care of items 1 and 2 ahead of my work. As with most quality advice, it took years to sink in.