Not every day – at least, I’m not happy all the time. It’s probably not realistic or sustainable to always be happy. Being happier in general might be a reasonable goal, and you’re in luck; Happiness Research has taken off as a field in this century. A search in our catalog under the subject “happiness” might be a good place to start, including: “The calculus of happiness : how a mathematical approach to life adds up to health, wealth, and love” QA93 .F467 2017.