Watch the A Little Choppy online guitar lesson by Brad Carlton from Chord Studies: Evolving Progressions Vol. 1
This is a four bar progression in the key of E, using the I, IV, and V chords. When using a barre on both the A and B chords, make sure you are muting the first string. To keep things clean between chord changes, try choking the strings by resting your right hand on the strings near the bridge. You may think this makes it sound a little choppy at first, but you'll learn to do it quickly and as long you're playing smoothly and in rhythm, it'll sound great.