1. Count your blessings

But not everyday. Studies found that people who once a week wrote down five things they were grateful for were happier than those who did it three times a week. It is because when people do anything too often it loses the freshness and meaning. Another exercise is to think of a person who has been kind to you that you’ve wanted to thank and write a letter. You don’t have to send it to feel happier.

2. Hear the music

Music activates parts of the brain that can trigger happiness. Music can also relax the body, sometimes into sleep as it stimulates the brain’s release of melatonin.

3. Move your body

Dance. Play a sport. Work out as hard as you can. Take a walk so your stress will take a hike. Moving your body releases endorphins, the quintessential feel-good chemicals found in your brain. Physical motion can provide a rush of good energy that can lift a mood, be it anxiety or mild depression, and it's a good way to keep healthy.

4. Laugh Big

People are 30 times more likely to laugh in groups than alone and, not surprisingly, laughter is associated with helping to develop person-to-person connections. Laughter, like so many other endorphin-triggers, helps to reduce certain stress hormones and, while it might be contagious, it strengthens your immune system rather than weakening it.

5. Do something nice for someone else

Small or big, directed at friends or strangers, random acts of kindness make the person performing the kind act happier when they're grouped together. Doing a considerate thing for another person five times in one day made the doer happier than if they had spread out those five acts over one week. There are social rewards, too, when people respond positively.

source: www.bbc.com