A general outline not meant to capture exceptions:
1) Be obsessed with the game.
2) Put in your 10,000 hours.
3) Have coaches for many years at the youth level that can polish you.
4) Debut professionally as a teenager. Again, with a coach that has a clue.
5) Get transferred to a “big club”, if not already there.
6) Continue learning and working harder and longer than your peers.
7) Be lucky to get recognized as a special player every step of the way.