Your attention is power, don't give it to whom you don't want to
When you are giving someone your attention, or thinking about them, you are giving them power. However, if you don't consciously think about them, you give the power back to yourself.
This is true for the media you consume as well. Avoid negative media that forces you to think about people you don't want to. Give your attention to people and things that you love, and your life will improve drastically.