What do you do when your cat won't listen to you?

Oops! Sorry! I can't point to anything in particular except the fact that most of the pet people I meet are female. I guess I assumed.

We defenitly move in different pet circles. I know pretty much nothing about keeping fish, though I did babysit an aquarium once. Nothing very fancy fish wise, but it was a tall octaginal tank, and I had great fun watching my first cat going round and round trying to get to the other side of the glass to get at the fish. "I try to touch the fish, and there's a window in my way; go to the other side of the window!" This cat was all looks, and no brains, but it sure kept him entertained.