Watch the Flop Eared Mule: 5 online guitar lesson by Cathy Fink from Clawhammer Banjo: Intermediate Module 2

Practice along at a slow tempo with Marcy Marxer on guitar. I'll drop out once in a while so you can have her accompany you on your own.

Practice with this over and over again until you can keep up FLAWLESSLY, then try the next practice.