Dopamine is a chemical that the brain releases when you smile, which might make you feel better. Having right amount of dopamine is necessary for both body and brain.
Regular exercise can lower stress and anxiety and increase happiness and self-esteem. Even doing exercise on regular basis has many benefits regarding health.
An important influence on emotions and happiness is thankfulness practice. Additionally, it helps you become conscious of all the good things in your environment.
You can calm yourself down and lessen stress by practising deep breathing techniques slowly.