1. Identify what it means to be good
2. Work endlessly towards that aim
3. Deliberately practice
4. Decide to refine strengths or squash weaknesses. Do this as frequently as possible. Make sure you have an accurate assessment of what your strengths and weaknesses are. (5) and (6) can help with this.
5. Consult the advice of those more experienced. As frequently as possible
6. Allow your work to be publicly scrutinized. Do not work privately, the feedback loop should be as tight as possible to inform (1)
7. Repeat (1) - (6) as frequently as possible
Do that and you will become better. Guaranteed. Note, this won't necessarily make you the best. However, it will make you better. Continue this process until you're as good as you desire. There, of course, are diminishing returns after a while.