I stopped reading and watching the news 20 years ago, when I finally noticed a correlation between my obsessive interest in current events (including politics) and my lengthy bouts of extreme anxiety, anger, and depression. My moods improved and became more stable after that. Additionally, I started to get along better with other people (especially coworkers) when I stopped involving myself in their discussions about current events (because I no longer believed that I had an 'informed' opinion to offer).
Prior to that, starting at around the age of 10, I avidly read all the news I could get my hands on, and watched the TV news as often as was permitted in our family (my parents tended to push us all away from the television as much as possible). Unfortunately, this lead to somewhat dogmatic and annoying behaviour in conversations with other people, as well as frustration, isolation and anger on my part.
Now, I read about current events, but I also try to remember that much of what is reported is missing key information, is motivated by undisclosed bias, and is either a distortion of the actual facts or is outright fiction. Also, because news is a commodity that is for sale, there is a built in bias for the sensational, unusual, and the anxiety-provoking. Ironically, reading or watching the news can build a very distorted sense of what is happening in our world.
I find it's worked best for me to temper all of my current events news consumption with recently published accounts of history, particularly ones which are based on information that has been newly revealed by technological advances or (in many cases) the release or discovery of previously classified government documents (or corporate or personal documents). As I'm addicted (currently) to science news, a lot of what I do read is filtered through the minds of people who tend toward a more forensic approach to learning about and analyzing events.
I've had a lot of UNlearning to do over the years, and I don't doubt that this process will continue for as long as I live.
After all, as Mark Twain is quoted as saying "It ain’t what you don’t know that gets you into trouble.
It’s what you know for sure that just ain’t so."