For me...8 days, 8 hrs, and 11 minutes, but who's counting.
Try to stay positive. Here's a prayer that my professor sent me. I'm not a religious person, but the prayer very much applies to my life, so I look at it often.
"God, grant me the serenity to accept the things I cannot change,
The courage to change the things I can,
And wisdom to know the difference."