A New Year's resolution is a promise you make to yourself to start doing something good or stop doing something bad on the first day of the year. A big problem with making stress reduction your New Year's resolution is that it's so abstract that you can't just swear to relax without being more specific. One of the biggest mistakes people make at the beginning of the year is that they establish a New Year's resolution that is too difficult or too big to keep. New Year's resolution is a kind of grand, glorified, long-term goal that people, for social reasons, tend to start on the first day of the calendar year.
You don't need to do it alone, especially if your resolution starts in the new year, when you'll have plenty of company to try to make a change in your life. American definition and synonyms of New Year's resolution from Macmillan Education online English dictionary.