My puppy won't stop biting...?

One thing I absolutely don't tolerate in my puppies is putting teeth on people. A quick grab of the muzzle and "no bite" for about three days gets the point across. Use as needed as a reminder. You're not grabbing hard enough to hurt the puppy, just enough to let them know that the behavior is unacceptable. A few seconds of ignoring the puppy after the correction is plenty of "punishment" in their little heads.