Watch the Lesson 24 online guitar lesson by Brad Carlton from Rhythmic Grooves
This lesson covers an in depth study of the sus2 voicings as played over different bass notes. This allows you to take the same voicing (fingering) and move it around to access more harmonic possibilities. You'll get to hear the options as the chords are dropped in at various points in the progression.
Finally you'll learn how to play a harmonized counter melody as a rhythm part. You'll find hundreds of ways to apply this very effectively in your playing. This is a terrific skill to develop and pull out when you want to spice things up a bit.