Watch the Lab Rat online guitar lesson by Fareed Haque from Soul Jazz Survival Guide
So, one of the reasons I chose this example to start out with is that it moves between two related keys. The chords are basically C7 and Eb7. Since we're using both major and minor pentatonics, what's the link here? Think about it...work it out. Give up? Okay:
C major pentatonic and C minor pentatonic go with C7. Eb major pentatonic and Eb minor pentatonic go with Eb7. Okay? So now, what's the common element, the link? Take a close look at Cm pentatonic - C, Eb, F, G, Bb, and now take a look at Eb major pentatonic - Eb, F, G, Bb, C. Notice anything? Anything at all? Oh! Oh! Oooh! It's the same notes! Dang. So, you could use Eb major pentatonic the whole way and it would work fine. Well, pretty good, except like a sandwich with salt and no peppa', it'd be boring and bland. Your call, your choice.