Here's what I do when I get to this point. I don't know if it will help, but I will suggest it anyways.

-Watch animal videos online. They make me laugh and smile so hard.
-Get out into nature, even if just to a park and take it all in. The beauty.
-Listen to music. I prefer classical because there is something so peaceful about it.
-Snuggle up in bed with a stuffed animal and watch a funny movie.
-Compliment a random stranger. Its a win win really.
-Paint my toe nails, do my make up, look great even if I go no where.
-Hit up a museum. Fascinating and calming environment.

Basically focus on the little things that make the world a nice place to be. It is so easy to get wrapped up in the things that upset us but there is so much more to the world.

Note: I am an eternal optimist, so it's okay to tell me to stuff my rainbows and sunshine up my butt. LOL. Hugs.