Not to bring down the party spirit, but there are only four more days in this year. Four! That doesn't leave a lot of time to accomplish any of those healthy lifestyle resolutions you made at the beginning of the year and didn't get to. But it does leave you time to think about where you went wrong with last year's and how you can do better this year.
First of all, it's important to make your goals SMART: Specific, measurable, achievable, realistic, and timely. For example, "I will eat better" is not specific; instead, "I will eat at least 60 grams of protein a day" or "I will have five servings of fruit and vegetables daily" are much more so. Those specific goals are also measurable; you're either meeting them, close to meeting them, or not even close.
"Achievable" means you have a true sense of where you are and how likely you are to make sweeping changes. "I'll run a marathon in March" isn't achievable if you only get off the couch to walk to the refrigerator now. However, running a 5K by March is probably doable. And just like "specific" and "measurable" are paired, so are "achievable" and "realistic." Again, "marathon by March" isn't realistic if you don't exercise now, but if you are consistently running 3 or 4 miles a day, then maybe it is and being ready for the fall marathon season absolutely is.
The final one, "timely" is really important as well, but less of an an issue with New Year's resolutions than other goals since they are time-limited by nature. However, since a year is a pretty long time, it can be helpful to set some checkpoints along the way to make sure you're on track.
What are your New Year's resolutions about healthy eating?