Watch the Shuffle Bass Line online guitar lesson by Brad Carlton from Guitar Lab: Big Blues & Beyond
This lesson combines the double-stops out of the C blues scale with a shuffle bass line. The pick plays the root (C in the eighth fret of the 6th string) and the middle and ring fingers play the double-stops.
Feel free to play any combination of notes in the scale, but keep the bass line grooving. Start simple, then build day by day.