Freeze a few cabbage leaves and then put them over your breasts and wrap your breasts very firmly with a long strip of cloth. I'ts constricting, uncomfortable, and can even get a little painful for a day or so, but it works rather effectively. You just have to keep changing the leaves for more frozen ones every few hours. Just re-cycle them by throwing them back in the freezer.

Or you can take the slow method that isn't as viciously uncomfortable, by just extracting less and less milk, less and less often. You'll produce less and it'll eventually dry up when you get to the point where you're not extracting anything.

Cheers, DA.