I agree with what everyone else said, especially crate training. I also have heard success with the bell. But one more idea to add:

Whenever the puppy is out of the crate, have her on a normal length leash attached to you. That way she is never out of sight and you will have the opportunity to scold when you catch her in the act. Even better, you will notice she's giving signs before it happens and have the opportunity to rush her outside.