Watch the Step It Up online guitar lesson by Paul Rishell from Dirt Road Blues
Here's another Blind Boy Fuller dance piece, "Step it up & Go" by Blind Boy Fuller (Vocalion, New York 1940). The original recording is a classic example of Piedmont blues and features a washboard accompaniment. The song also features a stop time verse, which is an old jazz trick.
We're in the key of G in standard tuning, with the capo on the second fret. The intro line is basically a boogie-woogie bass pattern on a G chord, followed by a C7 chord played in Travis-picking alternating style.