: A "secret" to his modern sound is using the whole-step half-step diminished scale to derive dominant chords that move in minor 3rds. He often employs a "slash chord" style harmonic approach to stretch these dominant functions.
: Practice playing through a basic progression (e.g., in E-flat) while aiming to enhance every scale degree with at least two different chord options.
: Shift specific notes within a melody by an octave to add variation without losing the theme.
: Before introducing personal harmonic variations, always state the original melody clearly so the audience can recognize the song's foundation.
: Henry often omits the root note from his hand voicings, especially when a bass player is present. He utilizes guide tones (3rds and 7ths) in the left hand and color tones (extensions like 9, #11, 13) in the right hand to create a sophisticated sound.