[Systemz]

What works well is an essential oil burner - they're like 5 bucks at Body Shop or wherever and buy some lemongrass or grapefruit essential oil. It'll stink up the room during the night and flip out the cat.
My all-time fave trick with my cats is the RC Car. Buy an RC at radio shack and anytime the cat goes near you after 7pm send the car after it. Believe me - cat's don't understand the RC. Then, when you go to bed, put the car just above your head. The cat's too freaked by the car to go near you. Believe me - I lived with my aunt and she was one of those "cat ladies". Before she got married she had 8.

My cat is full-grown and is a third the size of a normal housecat. She's trailer trash, but smarter than hell. She's got me all figured out - when I get home after a night out, she stands by my bedroom door like a pissed-off housewife until I let her in, where she goes and sits beside the PC until I finished my nightly stream of drunken Emailing, and then runs to the can so I'll pour her a cup of water to drink, which she knows I'll put on my nighttable for her to drink while I read - when she's done drinking and cleaning herself, that's my signal to put the book down and go to bed. She sneaks under the covers and sleeps on my chest to keep warm. No imagine when I've had girls over at my place - this sort of routine can sort of wierd a person out. And so can a cat slightly larger than a guinea pig with eyes like a goddamn Ranma character.