You can start your life over at any time. Feel free to invoke a do-over if you didn’t get into the right school, made a gaffe during a job interview, or said something you regret during a fight with your partner. Use it during a heart attack, or on the way down after you jumped. Just remember: You’ll be a baby, with no memory of your past, nor any knowledge that you started over. You will, however, be a little more tired each time around. Sleepy today? Perhaps you're on your 20th, 50th, or 127th redo. That’s simply the deal.