I've become a big Brandon Sanderson fan and recently read his The Way of Kings which has become one of my new favorite books. It's a fantasy book and one of the mottoes of one of the groups in the book is "Life before death. Strength before weakness. Journey before destination." I'm not sure why, but that motto resonated strongly with me and it fits in my idea that you need to do as much as you can when you can because you never know when your last day will be.