Do as little harm to others as you can; make any sacrifice for your true friends; be responsible for yourself and ask nothing of others; and grab all the fun you can. Don't give much thought to yesterday, don't worry about tomorrow, live in the moment, and trust that your existence has meaning even when the world seems to be all blind chance and chaos. When life lands a hammer blow in your face, do your best to respond to the hammer as if it had been a cream pie.
