I think a new year resolution is a flawed mindset to begin with. Like if you really wanted to change an aspect of your life, why would you wait for an arbitrary date to start? you'd just start asap.
It's like when people keep setting dates in the future of when they will start a diet, that's how you know they don't actually want to diet.
Some people already knew what they wanted this year and started late last year, and made it more serious by turning them into resolutions for this year. For those who started Last year, the resolutions will be easier for them to keep. If you just started this year to act on your resolutions, discipline is key and you just have to always remind yourself why you taking that step.