Happiness is not found. It’s not an object, rather a state of perception. The more you’ll objectify and discretize happiness, the less likely you’re to achieve it.
That being said, usually drugs.
On a serious note, two books helped me to understand this mystery a bit more
- Zen Mind, beginner’s mind by S. Suzuki
- Flow: the psychology of optimal experience by Mihaly Csikszentmihalyi.
Ah, another non mainstream source of inspirational knowledge is the Blindboy Boatclub podcast. Over years he produced a lot of episodes on the subjects of mental health and experiences delivered in a very democratic, relatable way. Mixed with crazy hot takes, like how Ney York disco was the original punk for/by LGBT community, seasoned with a thickest Limerick accent and storytelling. Delicious.