Start by hearing the movement between major and parallel minor, one of the defining sounds in Four. Instead of treating these as separate chords, begin to hear them as a single relationship. Once that shift is clear, the progression starts to make more sense, and your lines can follow the motion more naturally across the form.

Next, develop short minor ideas that you can move with the harmony. In the second part of Four, the chords descend by half steps, so the key is having small phrases you can shift along with that motion. This keeps you from having to come up with something out of thin air on every chord.

Finally, strengthen your command of ii–V–I movement, which appears throughout the tune. Hearing how these progressions resolve gives your lines direction and helps you move through the changes with clarity. With a few solid approaches in place, the tune becomes much easier to play at tempo.