Watch the Progression #1 in G online guitar lesson by TrueFire from Acoustic Guitar Greatest Hits Vol. 2
Lesson Source: Marcy Marxer's Swingin Rhythm Handbook
Here is the combination of G6, G#dim, Am7 and D9 in a chord progression you can use as part of a song, as a turnaround and as an intro or a vamp. It's a versatile progression!