Watch the Arpeggio Exercises online guitar lesson by TrueFire from 50 Licks Greatest Hits Vol. 2
Lesson Source: Muriel Anderson's 50 Right-Hand Techniques
This arpeggio exercise is a nice warm-up for the right hand, and sounds cool so it may come in handy for someplace in your music as well.
The pattern for Villa-Lobos's Etude #1 is also a great warm-up, and handy if you want to play this piece later on.