I feel like people on PH are better than this. Only 9% of people complete their New Year's Resolutions. If you're the kind of person who waits until the new year to start new habits or goals, you're already behind.
Goals and habits should be started on the day they are thought up. If your New Year's Resolution is to eat healthier or go to the gym, why wait?
If you have the mindset to wait, you'll have the mindset to stop or find an excuse otherwise.
Start your New Year's Resolution today and don't call them that, it's just a normal goal or habit.