"A mind dominated by positive emotions becomes a favourable abode for the state of mind known as faith. A mind so dominated may, at will give the subconscious mind instructions, which it will accept and act upon immediately."- Think & Grow Rich, Napoleon Hill
Our actions are driven by our emotions which are driven by our thoughts, which in turn are driven by our environment. And our 'environment' often consists of what people around us say, and what kind of words go into our mind. So, honestly, I have been curating the content I read and watch a lot more carefully. I have stopped reading news, even if that makes me less informed, because it's just depressing, and there is nothing I feel like can do about it. I have set up redirects from websites like the bbc to other sites in Japanese. The same goes for discussion forums and youtube comments. The problem with these is that they are like gambling, you might come across a good thread once in a while, which is what keeps you coming back, but there's just too much demoralising content.
I have always worried about being delusionally positive like cult members are, but the opposite problem is far more common, becoming unable to take action due to pessimism. It's just much easier to do things if you fill your mind with positive thoughts, and that's what matters. Just like nobody has tears for a coward, no one cares for someone who just complains about their life. #Think&GrowRich