Lift your knees very high for most of your steps. A characteristic of both Molly and Morris dance is high knee lifts, which is generally thought to symbolize the high-stepping of horses and ponies on the farm.
Make noise with your hobnails. You won't be able to avoid making some noise if you're on a hard surface since hobnail boots are notoriously noisy. However, that loud clacking is another trademark of dancing in the English folk style. It, too, symbolizes the striking of horses' hooves.
Master creative and quick footwork. You don't need the training of tap dancing, necessarily, but dancing in hobnails has always been known for its fancy footwork. Start with simple crisscrosses, jumps, foot sweeps and side steps. Begin slowly and add speed as you master each step. For variety, make a slow, exaggerated movement and return to your quick steps.
Use a stick as a prop. Both Molly and Morris dances use simple rods as props. You can twirl it like a baton, pick up a second or third stick and juggle them, grab both ends and jump the rod like a rope, or interact with it as if it were nearly any other linear object you can imagine. If you have a partner, you can toss the sticks back and forth to each other.
Control your facial expressions. Hobnail styles of dance are not formal. In fact, these folk dances are usual performed as street theater, and they are often quite comedic. Know what your face is doing while you dance, and work in some quirky gestures like winks, smirks, shrugs and grins at appropriate times.
Recruit a few friends. Molly and Morris dances are performed by troupes or crews. You never see a solitary Molly dancer. Practicing alone is all right, but for best effect, get four to six friends to join you.