Another thing I'd do is think about some of my online friends when I was doing something totally unrelated to being online; I had had a discussion about grapes (a friend use to take too many Tylenol and I told her to OD on grapes instead :-) so when I would go to the store and be in the fruit department, I'd think about her and all our various conversations, etc. You might want to carry on a conversation with "me" when you have to get up and go to the bathroom, ask me to get your back if the monster comes out of the closet, etc.; make it really really silly (monsters or evil wizards, etc. instead of mere burglars or even murderers), if you are afraid of clowns or something that sort of embarrasses you (I get nervous around those huge theme animals like Mickey Mouse, Donald Duck, etc. at Disney World), make it much bigger and imagine it crammed into your closet and how pissed it would be having to wait there until it can attack you

Or, you could just invent a pet boxing kangaroo to keep in your room, give him a name, etc. and have him be your night guard?