" Even simply having goals can make us happier and more confident—both now and later. In one study that followed nearly five hundred young adults from college to the mid-thirties, increased goal-setting in the twenties led to greater purpose, mastery, agency, and well-being in the thirties. Goals are how we declare who we are and who we want to be. They are how we structure our years and our lives. Goals have been called the building blocks of adult personality, and it is worth considering that who you will be in your thirties and beyond is being built out of the goals you are setting for yourself today. "

― Meg Jay , The Defining Decade: Why Your Twenties Matter—And How to Make the Most of Them Now