I don't train my cats, hehe. But I watched several documentaries on it (my bf was very interested). And we really liked the one which shows the making of the cat commercial for Whiskas in America. The trainer was very patient and taught many things thru the show. She said that most cats are food motivated and they can learn many tricks.

She showed how to teach using food and the clicker. That's how they shot the commercial. Very cool.