A rolled up newspaper can be an effective training tool when used properly.
For instance, use the rolled-up newspaper if your ferret gets into something
inappropriate or has a housebreaking accident. Bring the ferret over to the
destroyed object (or mess), then take the rolled-up newspaper... and hit
yourself over the head as you repeat the phrase,
"I FORGOT TO WATCH MY FERRET, I FORGOT TO WATCH MY FERRET!"