To me, happiness is doing what I love. No matter what, when I'm with my family, playing piano, dancing, etc. I feel happy. Being able to feel happiness is a privilege that a lot of people take for granted. Happiness is usually found in the smallest of places. Everyone has a chance at feeling happy. The trick is to notice the small things when they occur :)
I usually feel happy when I bake, spend time with family, talk with my friends, play piano/guitar, lay in bed, eat, etc.