You may think you need a lot of skills in order to succeed with your goals but there's really only one key skill.
Once you've figured out what you want to work on and you've made a commitment, the skill you need to develop is the skill of being consistent with your
actions. After studying so many successful people I can vouch that most of them credit their success to being consistent.
If you want to truly achieve your goals more than working hard, more than any other skill become superb at taking quality consistent action.