To learn Don Marsh - The Greatest Thing chords, grasp the musical fabric of the song with this sequence - Dm, Gm, C, F, Bb, Cm and Fm of chords. To build a solid grasp, start slowly at 72 BPM and then match the original tempo of 145 BPM. Fine-tune the capo based on your vocal range, ensuring it complements the key of Eb Major.