4. 61 things you should never mention to a ghost.

Although most ghosts are fairly well adjusted to the spirit world, occasionally they do feel a bit down. If you notice your ghost guest starts to cringe a bit when you mention things like life, blood, smelling flowers, touching, hearing, seeing... (Oh, dear, I'd better stop here, or your poor spirit guide may become depressed while you read this together)...anyway, try to avoid showing too much joi de vivre while entertaining ghosts -- it really is quite rude, if you think about it.