I'm reading "The Road Less Travelled" by M. Scott Peck. This is really good stuff, makes you to rethink your life a lot. I like this passage:
"With death's counsel, the constant awarness of the limit of our time to live and love, we can always be guided to make the best use of our time and live life to the fullest. But if we are unwilling to fully face the fearsome presence of death on our left shoulder, we deprive ourselves of its counsel and cannot possibly live or love with clarity."