Watch the Dominant Soloing 1: 10 online guitar lesson by Brad Carlton from Bluesology 1
A detailed look at the V7 chord will be one of the subjects of this segment. You'll discover some of the altered extensions for G7 are found in a C blues scale.
If you get tired of playing the blues scale for every chord and you find yourself in a rut, try sprinkling in some arpeggios. Mixing up your blues scale and arps will generate some variety in your solo.