Aren’t your 20s the years to have fun and go on adventures? Yes, they are. And the adventure could be entrepreneurship. According to Meg Jay in her book The Defining Decade: Why Your Twenties Matter, doing something later does not automatically mean doing something better. You do not have to wait until you are older and more equipped for entrepreneurship to venture into it. And if you are in your 20s and raring to go, pick up the book while at it.