One of the smartest ways to control anger and hatred is to cut its fuel. It is called daurmanasya. It is like a reservoir of highly inflammatory fuel, that only needs a spark to burst into an explosion of anger and hatred. Depleting that fuel also leads to a positive outlook to life.
It is said that one should descend with the view from above and ascend with the conduct from below. It is equally important to maintain a view as vast and open like the sky, and to engage in conduct with precise regard for the cause and effect relations.