If how we spend our days is how we spend our lives, then if we spend our days anxious, we'll spend our lives anxious, too. And yet, stress is a defining feature of contemporary life—this past year, 55% of Americans reported experiencing "a lot of stress" on a daily basis. Good design might not be able to intervene in a cultural existential crisis, but it can help build spaces that calm and restore us. Here, we talk with interior designers about how they create serene homes that counter the chaos of our lives.