Some identical decks of Tarot cards, about one per player. The Rider-Waite decks are cheap. Also have on hand all the little manuals that come with the decks.
A big stack of 3x5 cards.
Pencils and paper.
Three or four players. More than that and the sessions may get rather long.
{Introduction <--> Campaign Genre}
-- ChrisLehrich? - 23 Dec 2004