No matter how many times you feel like you fail before making progress on your goal, don’t forget that this gospel is for people who keep on trying. The Savior lived a perfect life to redeem our imperfect lives, and He can help you improve through the power of His Atonement, even when it feels impossible to you. As you set goals to become like Him, seek Heavenly Father’s help and direction. He will help you to make righteous changes as you work to improve in all areas of your life!
Natasha Andersen, "The Children and Youth Program: Designed for You", New Era, June 2020

Although this article was directed to the youth, it reminded me of a few things with setting goals, especially now with resolutions.
Specifically, this article mentioned that we will not achieve 100% of our goals, 100% of the time. We will falter sometimes. We will fail sometimes. We will slip and fall sometimes. Important thing is, of course, that we keep on trying. Remember... Nephi tried 3 times before he obtained the plates.
In talking with Kyle, er Elder Pullin, last night about setting goals, he talked about the SMART method of setting goals. Goals that are SMART are Specific, Measurable, Attainable, Relevant, and Time-based. Remember to set goals that are SMART.
This article gives 5 tips for setting goals...
1. Begin with the end in mind. Do the goals help to achieve the ultimate end?
2. Seek revelation. Ask the Lord where you need to improve.
3. Balance the short term and long term goals.
4. Break goals down. Make smaller, daily goals to reach the bigger ones.
5. Share the goals. Recruit others to make you accountable and they can support you as well.