Watch the Lullaby Pattern online guitar lesson by Muriel Anderson from 50 Right-Hand Techniques You Must Know
Try other patterns concentrating on relaxed the right hand. The lullaby pattern is a nice one, plucking two strings at once with the middle and ring fingers. You have a little time for the fingers to fall back into a relaxed position, but be sure they are hanging over the strings by the time it comes to strike the strings again.
When finished, I curled my fingers up, but when continuing the arpeggio, allow the fingers to fall back relaxed.