When professional psychologists answer this question, they usually boil down to three key pieces of advice:
Talk to a stranger. American scientists are convinced that people with a bad mood, who overcame shyness and talked with others, as a result significantly improved their mood and mental well-being. And those who, being depressed, had no contact with anyone, did not become happier.
Spend time with friends and loved ones. Scientists tracked the emotional state of 80 people for four days. And they found out that the happiest people are those who communicate with relatives and friends more often, discussing topics that seem important to them.
Listen to sad music. As it turns out, sad melodies allow us to experience catharsis and promote empathy. And they also create a feeling of nostalgia and awaken pleasant memories.