We find negative articles in media about Islam or Muslims which is biased. What efforts should we put to overcome the negativity spread by media?

The media is not a mission, it is an industry of reporting what is happening in the world. What you have referred to as "negative articles", is nothing but objective reports by the media of Muslim activities. If Muslims are involved in militancy, it is but natural that the media would report it as violence. It is not possible that Muslim themselves be active in perpetrating violent activities and the media report it as a peaceful news.

In such a situation, you have to tell Muslims not to create violent news. If Muslims are busy in engaging in violent activities, then it is not possible to change media's present reporting about them. The blame, in such a scenario, goes to the Muslims and not to the media.