If you've ever wondered how to be a 20-something, you're not alone. Through articles, columns, and the lists that fly across our screens and social media feeds, we're bombarded with advice on how to be our best selves. But there's one list that smashes them all, and that's the list of 100 things. If you've ever needed advice on how to be happy, look at the world optimistically, annoy your significant other, be a woman, or apologize, there's something in this book for you.