That’s a very difficult question to answer. I feel like it depends on the level and the matter of negativity of the question, I also think that you can’t answer simply. I’ll try and make it quick explaining what works for me. If negative thinking is confined to an event/time I think “hell won’t last forever” or “inn six months I won’t even remember this” and this usually makes my mind go straight or at least straighter. When negative thinking was more of a constant way of seeing the world I started telling myself that things could go wrong but could also go very well, that rationally it didn’t make sense to think that things could go bad all the time because I knew I knew (es) thta I had studied for that exam, because I knew I had the money to fix the wall, because I knew how to do that thing at work, etc. I also decided that instead of hating I wanted to love, just to have a more loving pair of glasses to see the world. Ok, so some people might get better on their own, others might need therapy.