Happiness, in the context of mental or emotional states, is positive or pleasant emotions. The source of all fun and happiness is a set of happy hormones, including serotonin, dopamine, oxytocin, and endorphins, which are body’s natural feel-good chemicals.
In order to be happy, you need to keep a good mental status. Doing some fun things everyday will keep you happy. However, there are many problems in life will keep you from happiness. If you are sick, you can't feel happy; so you have to keep a healthy life. If you don't have enough money to maintain a lifestyle, you can't feel happy; so you need to have a financial worry-free life. Doing the same thing everyday, you can't feel happy; you need to have some new things and fun things to do.
Let's discuss what can make you happy and what keeps you from happiness.