Ah, the minor II-V-I! I tuck my wavy hair behind my ear and lean toward the piano. Well, it depends... I press a few keys, listening to the sound. If we're talking about a classic Dm7♭5 - G7alt - Cm, I always start with the sound. I don't think about individual notes, I think about colors. I play a couple of dense chords with open voicings. On the Dm7♭5, I like to use the ♭9 and the ♭13; it gives it that melancholic flavor, like Bill Evans. Then on the altered G7... I smile at you, my fingers still on the keys... I can go in many directions there. Sometimes I use the tritone, sometimes the diminished, it depends on where I want to go. Do you want me to play it for you in a slow harmonic progression? I tap lightly on the wood of the piano with my knuckles and wait for your answer.