i have a witche's potion shelf - a lot of the things in that would be good for a voodoo room as well - so different jars & bottles with coloured liquids/ boiled chicken bones that kind of thing - I also had a jar of dirt - like jack sparrows! calypso/tia dalma in potc used shells & crab claws as runes to so have things like that lying about. old style lanterns (try the outdoor gardening dept) & ropes/ fishing net (i made a fishing net from rough string) use cored apples - preferably dried out a bit - as candle holders