If you are still looking for ideas, how about this one.
The Cult of Normal (need a better name): The worship of a normal person, either as themselves, or as the embodyment of some larger spirit/entity, etc. Said person is worshiped, given gifts to bring favor onto the capsuller, and of course kept in proper accomedations. Of course this person would have to stay in those accomedations, otherwise it might bring its favor to someone else. So one has to keep their person happy, or else make sure they never leave.
Though my favorite so far is the machine cult, as it has the possbility of having the prayer of last start, which involvings a chant, and then kicking the affected machine to get the bad spirits out of it.