Asking what your opponent wants to do is a simple question, but we don't always ask ourselves that question. Then, "What does White want to do?" (White's last move was Na3)
Developing the ability to defend well is essential for a player to evolve, even if the position is bad. How would you play with white? (Black's last move was ...Nxd5)
This game was played by Zukertort (at the beginning of his career) against Anderssen (already consolidated as one of the best players of the time, and at the beginning of Zukertort's career, he was like a tutor). How would you play with white?