Well, what an interesting question! :)
Happiness is ideal. Happiness corresponds to some short moments of our life and sometimes we can't even feel it.
What I try the most to be happy is thinking that I have a family that loves me, I have a roof and food, for the rest my health could be much better and sometimes it's hard to struggle, but things could be worse, so I'm thankful,
Happiness is most those little moments with your loved ones!