Watch the One Note Two Strings online guitar lesson by Geoff Hartwell from Guitar Lab: Electric Slide
Now we’re starting to move into the rest of the strings, while also adding another finger on our plucking hand. You’ll notice where the musical idea came from, but by adding notes and slightly different technique, we can get some great new sounds. This is based on the earlier example, but there are two important advances; with your plucking hand you’ll be resting with your thumb, and then actually plucking with your index and middle fingers. At the same time, make sure that your slide is acting like a movable fret on top of the strings and that BOTH notes are in tune.