Having a life:
1) hobbies, either personal or social... gardening, skiing, anything to do with boats, riding street bikes with my crew
2) friends that you see as often as everyones' schedules allow
3) a job that is rewarding is some way... either awesome coworkers or something that makes you feel like you've accomplished something at the end of the week- my work is very gratifying to me.
4) family- even if you don't always get along- I think that it's important to spend time together- especially impromptu