Watch the My Turn online guitar lesson by Brad Carlton from Groove Builder

"My Turn" is just a vamp between C7 and G7. You can use G blues over both chords as well as G Minor Pentatonic. A great way to zero in on the C9 is to simply play the G Minor Pentatonic scale from C to C but with the F note replaced with an E. This yields a C9 Arpeggio (condensed form).