Graveyard etiquette from a cranky traditional witch:
-Leave shit at the gate (coins, cigarettes, eggs, flowers)
-If alone go in silence, if with others speak in a hushed tone
-Wear a hat or head covering to prevent possession or bringing home unwanted spirits.
-Bring bells and/or rattles to wake the dead if desired
-Smoking in the graveyard or carrying a flame is an easy way to get the attention of the dead at night.
-Bring a knife or object made of iron should things get hairy (always bring a knife). Canes are also excellent tools for working with the dead
-have a way of gathering occult materia without being noticed by people or spirits (invisibility charms work best)
-If you're bringing spirits home with you (intentionally), don't turn around until you're across the threshold of your home
-Upon leaving the cemetery, say a prayer for the dead and wild things that inhabitant there
-When home, spread white powder (flower, salt, ect...) at the door to keep unwanted spirits out. A colander over a key hole works too.