Watch the Chord Melody online guitar lesson by Jason Loughlin from Rockabilly Survival Guide: Lead
Playing a chord melody is a nice way to change up your solos. It works especially well on slower tempo tunes or anytime you want to fill out the sound. When you do this as a general rule stick to the top four strings of the guitar. This helps the solo cut through more and stays out of the way of the bass player. It's helpful to think of chord melodies like connecting dots. You have your chord shapes to aim for and you use passing tones and altered chords to fill in the gaps. To do this the most basic thing you will need to know is the Dom 7th chord inversions on the top four strings.