First, why not "Happy Talk"? Remember the song from South Pacific? Are you by yourself? Think of the talk in your head. Are you pissy or are you happy? Do everything you can to make the inner voice some happy, positive message to yourself. Okay, so that's my first idea off the cuff.
Second, dance! This works for me. I turn up the portable radio and start bouncing around. I've been told I'm a hell of a dancer (I've never watched myself, so I can't really say). My last full-on public dance session was at Paje Beach on Zanzibar. I've always been one to simply let my body feel the music. So, whether on the beach or in your kitchen by yourself. Dance, dance and then dance again! Really, it somehow boost the "happy-self".
Third, this'll be my last brilliant idea. Find a pet. Unconditional love is a real boost. Animals can give it to you. They don't understand "the world is a harsh place". They understand, food, petting and the need to go to the bathroom. Somehow above it though they understand love is a good thing. Listen to them! Currently, my fish find my life pretty damn silly.
Hey, keep the happy talk going. I know I will. Happy trails, Joe