A complementary point of view is Echart Tolle's 'The Power of Now'. Part of successful living is learning to live in the now. Why dwell on the past, enjoy living right now. Worried about the future? What can you do about your worries? If anything, do it. If nothing, place your faith in God, and enjoy the now. Smile right now, whether you feel like it or not. 96% of what we worry about, never happens. Worry is only useful if it leads to corrective action. Otherwise, it saps your energy and is a real downer. Right now, I feel good, I'm just going with that, nothing else matters.