Watch the Two Chords Two Keys online guitar lesson by Joe Pinnavaia from Focus On: Fusion

Starting to play through changes with two chord vamps. D Min7 to D Maj 7 - only a whole step separates these keys but it's still a challenge to navigate the fretboard. Again triads and chord shapes can be used to stay inside the keys but also look for ways to resolve into the changes. A line that goes from G, F#, to F natural would work great and in essence is a chromatic line. If you look at places where this happens on the fretboard it can free you up to try resolving and landing on tones within the changes.