There are, unfortunately, people who forever gossip, perhaps as a result of their inactivity and their need for social involvement. Unless one honestly feels that he can help such a person to mend his ways, he should avoid his company entirely. If contact with such a person unavoidable, it should be minimized to whatever degree possible.
One must also avoid settings that are prone to discussions of gossip. Ideally, one should find a way to permanently change the nature of conversation at such settings so that those present will be spared the evils of rechilus.