Guitarists often rely on default techniques for accompaniment: strumming, alternating boom-chuck bass/strums, or fingerpicking single-note patterns. You can cover a lot of ground with those techniques, but there’s another way to play that is often overlooked: picking multiple strings simultaneously with your fingers.
Just out in the November 2016 issue of Acoustic Guitar: my lesson on pianistic picking, a versatile and great-sounding technique notably used by Paul Simon in "American Tune." Read and watch the lesson here.