Chordal Arrangement Techniques
This video on chordal arrangement techniques has two steps. The first step is simply going up a diatonic third of the key for whatever chord is being presented and adding that chord to the arrangement.
Example Key of C Major:
Cmaj7 up a diatonic 3rd would be Em7 Em7 simulates The Cmaj9th Dm7 up a diatonic 3rd would be Fmaj7 Fmaj7 simulates the Dm9th
The 2nd step of this arrangement is preceding each chord with a 5th tone higher and making that a dominant chord
B7 - Em7 The B is a 5th higher than E
Which simulates at least the roots as a two five chord progression. Keeping in mind that the dominant chord should be altered depending on the melody notes that are played over it. As always keep on strumming