Watch the Let it Ring online guitar lesson by Jeff McErlain from 50 Blues Guitar Licks You MUST Know
This is one of my favorite licks of all time. It's a bit tricky at first because we want to let the high string ring out throughout. This one really plays up the blue note (b5) for a cool swampy sound. The added hammer-ons and pull-offs make for a smooth sound. Experiment with dynamics on this one by starting off soft and gradually getting louder. Although this example is being played on an Em blues, this lick will work over a standard blues as well.