Pessimism isn't a good thing to dwell on friends. It's the easy way out. Anyone can find the bad in anything, but it takes someone special to rise above and find the good and positives. So don't be consumed in negativity.
What keeps me positive and going is writing. Writing about things I like. Also my family and friend's. I want to be a good influence and have those around me have a brightened day because of my actions and how I act. This is what keeps me going and optimistic.
Also with all the negative news, here is a source of good news from around the world.
https://www.goodnewsnetwork.orgAnd of course another thing that keep so many going is their faith. Whatever it may be, Christianity, Judaism, etc. It can be a beacon and a bright spot in dark times.