@Jby51 posted a question about a C → D → Em chord progression in another thread. I recorded an example of how I might approach that progression. Mine goes Cadd9 Dsus2 Em7 G6 (sometimes substituting Gmaj) and a “B” section that goes | F#m | F#m | G | G | F#m | F#m7 | G | A7 |.
The recording is nothing fancy (guitar’s internal pickup straight into the interface), but I added some reverb and looped it in the DAW to make it sound a little nicer. Added a quick MIDI bass line, too.
So here’s the “Martini for John” progression: