Watch the 6th String Approach online guitar lesson by Jason Loughlin from 1-2-3 Rockabilly Guitar
The 6th string approach means we are starting with our root on the 6th string and trying to stay in position for the IV and V chords. So instead of jumping around on one string I'm going to look for the IV chord on the 5th string. It's super simple to find. Let's stay in the key of G. So the root of my I chord is G third fret of the 6th string. The IV chord is directly underneath on the third fret of the 5th string. The V chord is always a whole step higher. So my V chord will be on the fifth fret of the 5th string.