That’s what we tell ourselves when facing a tricky problem or a difficult project. But a growing body of research indicates that we’ve got it exactly backwards. What we need to do, says acclaimed science writer Annie Murphy Paul, is think outside the brain. A host of “extra-neural” resources—the feelings and movements of our bodies, the physical spaces in which we learn and work, and the minds of those around us—can help us focus more intently, comprehend more deeply, and create more imaginatively.