The more your pursue happiness, the more you push it away and you wont be happy. You cant chase happiness, you have to live a fulfilling positive life and you will naturally be happy.
Happiness come from meaning like the book Man's Search for Meaning. Having meaning in life gives you a sense of purpose and drive to keep going and accomplish.
Happiness comes from Positive Thinking. Think good and it will become good. Stop thinking negatively. Negative thinking helps no one. More more positive you are, the happier you will be.
Have gratitude. Think about all the blessing in your life.
Lastly, smile more. Fake it until you make it.