If you've ever been involved in a situation where gutting it out seems to be the only solution, check out Jim Stroup's post. An excerpt:
What he told me was that some mornings on the way to work he would become so discouraged at the prospect of facing yet another such daunting day, he would have to pull over to the side of the road. He knew he couldn’t let his staff see him like that.
He would stop, set his difficulties up before him in his mind’s eye, face them down one by one, and then continue on to the office, once more grimly determined to pursue his work with force, focus, and integrity.