Watch the I Use To online guitar lesson by Corey Congilio from Blues Guitar Fakebook: Rhythm Vol. 1
This slow blues, "I Use To", is based off the Lightnin' Slim tune, "The Things That I Used to Do". We're using loads of 9th chords here. I really like the second half where I'm mimicking a piano part. Often times you'll be the only harmonic player in the band, so mimicking keyboard parts can really come in handy.