Wanted to come back to add a few more uses:
Surrounding your house with graveyard dirt is a powerful protection.
Rub it on your hands then shake hands with someone you want to effect, intention matters and can effect you so avoid hexing this way.
Sprinkle on the property of your intended target or a poppet - depends on your intention such as hexing, sending spirits after them, protecting them, etc.
Create a faux grave or fill a small coffin with the dirt to bury something you want to let go of (feelings, a person, etc, also a hex if intended)
Create ink my mixing it with water.
Seidr and Útiseta (norse trance work, útiseta done by sitting a top a grave mound but if not available I suggest holding the dirt in your palms or lie down and put it on your forehead or body or underneath your body)
Throw it to dispel unwanted anythings (curses, feelings, spirits, etc)
Invocation of the spirit it came from (probably obvious but wanted to add)