“There’s a book, How of Happiness that says that in scientific studies – real stuff, not asdfadsf ”

There's a book, How of Happiness that says that in scientific studies - real stuff, not pop culture - only 10% of our happiness comes from our life situation. The rest in our biology (i.e. depression) & attitude. Get people to adjust their attitude by using their head to overrule their heart. Make lists of happy things in their life & keep a diary rating each day 1-10 happy.