Neat way of winding up the characters... every so often, when someone falls asleep, roll your dice and pass them a note: the poor dear has had a nightmare. If you occasionally slip in something apposite to the adventure, they will get even more paranoid every time they dream...
"You wake up in a panic and do not know why. You are afraid to fall asleep again." Most of us know that feeling in real life, how would you react if it happened to your character?
Or this: "You must give a public speech naked."
Some of the options are quite disgusting. A few refer to technology such as TVs, but it's a trivial matter to switch those out for items appropriate to the genre of your game.
A nice way to mess with your players' heads.