I slept straight through the night and slept an extra hour this morning. How? I had an evening of belly laughing humor. Laughter has many positive physical impacts on your body.
When you laugh or even simpler, when you smile, it triggers your brain to release endorphins which act like morphine, reducing your perception of pain and aiding muscle relaxation. You get a similar effect from exercise e.g. "the runner's high" Long term effects include improved immune system, pain relief, improved mood, and overall increase in personal satisfaction.
Check out what's happening in your local area. Are there any comedy groups playing? Invite friends over or have game night with your family and play simple silly games like Pictionary or Headbanz (my personal favorite). When deciding what to watch for T.V. - choose a good comedy!