Watch the Sliding Doublestops online guitar lesson by Jeff McErlain from 50 Blues Guitar Licks You MUST Know
Here is a cool one for you. I especially like the use of the natural 7th at the end to add some tension and bend the ear a little. The blues is all about tension and release, actually so is life if you think about it. It is the more challenging moments that make you appreciate the smoother ones. Wait... you mean there are correlations between life and art?