Watch the Holy Grayle online guitar lesson by David Hamburger from Blues Architect

Triads, triads, triads... they sure do help you get around the fingerboard, in my experience. And there really aren't that many shapes to keep track of, really - three major shapes on strings 4, 3 and 2; three major shapes on strings 3, 2 and 1. Drop the major third of each of those six shapes and you've got your essential minor triads as well.