Watch the Arpeggiation online guitar lesson by Jason Loughlin from Country Guitar Survival Guide: Rhythm
Here's one of the easiest ways to get movement into your rhythm parts. Great for ballads and waltzs. You're just outlining the notes that make up the chord. It sounds best when you establish a picking pattern. There are an infinite number of ways to do that. We'll look at a couple simple patterns. Try to mindful of voice leading your chords. The smoother your transitions are the more your part will marry with the rest of the rhythm track.