My motto in life is that If you believe you can, you probably can. If you believe you won't, you most assuredly won't. Belief is the ignition switch that gets you off the launching pad. I never expect to lose. Even when I'm the underdog, I still prepare a victory speech.
In this regard I would like to mention that a sweet friend of mine has taught me that holding on to anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burned.
So friends, 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; begin it well and serenely a