Most resolutions don’t stick because they’re not resolutions. The idea behind the world resolution is to solve a problem. So for starters, approach resolutions as problems to be solved.
And then? The word itself tells you what to do next. “Resolution” comes from the Latin resolutionem, which means “to reduce things to their simplest form.” Mathematicians liked the idea so much that, by the mid-1500s, they’d adopted the term solve (from the root of the word resolution), indicating that the way to address a problem is to reduce it to its basic step-by-step components. This, in turn, led to the modern word resolute, which means not just to “stick to” something, but to adopt a plan that has “the power of holding (you) firmly” in place by providing a step by step process.
So, if you want your resolution to stick: 1) Identify a problem, 2) reduce it to basic steps you can take to solve that problem (“pray, walk past cookie aisle, go to fresh fruit section…”) and, 3) resolve to follow it, knowing that your plan contains stick-to-able steps to take you all the way!*
*Unless Godzilla eats the gym.