Psalm 13:5-6
"But I trust in your unfailing love, my heart rejoices in your salvation.  I will sing to the Lord, for he has been good to me."

I have found out that instead of giving up or giving in, trust wholeheartedly in God and hold on to your faith.  In times of despair, it is harder to hold on than to give up.  But if you give up on God, you give in to a life of despair, with no peace or joy.