Step 1: Sentence Analysis. The sentence discusses a New Year's action or commitment. The term "resolution" is standard for New Year's resolutions, denoting a firm decision or commitment for the upcoming year. Step 2: Conclusion. The appropriate word is "resolution," aligning with the context of a New Year's decision. Consequently, the correct option is 3. resolution. Final Answer: \[\boxed{\text{The correct answer is 3. resolution.}}\]