My quote I used:
Finish each day and be done with it. You have done what you could. Some blunders and absurdities no doubt 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.
I just this quote because I feel that this quote is very true and meaningful. Once your day is over, its done. It is time to move on and venture into the next day! I believe it is a good quote to live by.