I love this Ralph Waldo Emerson quote: 

"Finish each day and be done with it. You have done what you could. Some blunders and absurdities have crept in; forget them as soon as you can. Tomorrow is a new day. You shall begin it serenely and with too high a spirit to be encumbered with your old nonsense."

And I love coming home to these paws scampering to greet me after a long day: