Space can be good, but if you want to create a bigger sense of dimension, adding in chords as responses to single-note licks can give you a new depth and texture, while creating an additional level of call-and-response.
The melodies and harmonies of Joni Mitchell's music rarely unfold in ways that our ears have come to expect. Here's a look at her guitar tuning Odyssey.
The meditative 1981 Michael Hedges song “Breakfast in the Field" uses two-handed tappings to fret notes on the steel-string acoustic guitar in unprecedented ways.