OK, you’ve got 20 million songs in your pocket. Now what? With endless choice comes a serious challenge: cutting through all that noise to find the next song that will change your life. In this era, the real rock star are the curators—the people, tools, and algorithms that bring you the music you’ll love. With the help of special guest DJ Questlove, we’ve assembled the ultimate guide to discovering the ultimate tracks (including Questo’s personal favorites).Your perfect playlist awaits.