It's not quite "New Year's Resolution" time -- but it's also true that the dawn of every new day provides a new opportunity to change what didn't work about the old one.
Hampering that often is our own unbelief / disbelief in our ability to improve. As Maxwell Maltz once wrote, "Your most important sale in life is to sell yourself to yourself." Why? Because you can be your harshest critic, and one area where that really shows itself is doubting your ability to change -- or being able to forgive yourself for falling short.
With the caveat that it's not always possible to take the following advice, because we do wobble and fall regularly as human beings, it's nevertheless quite great advice -- from a well-known American sage:
"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 in serenely and with too high a spirit to be encumbered with your old nonsense." -- Ralph Waldo Emerson.
Whether it's New Year's Eve tomorrow -- or just another day -- this remains good advice to heed, particularly as we try to put into place changes that will be for our and our loved ones' good.