Over 60% of Americans complain about their sleep. Although we spend one-third of our lives sleeping, relatively little is known about the night-to-night sleep patterns in daily life. With recent technologies, it is now possible to objectively monitor a person’s sleep over multiple nights — spanning weeks, months, and even years — in a natural sleep environment without affecting their sleep routines. This opens up countless possibilities, ranging from advancing the knowledge of sleep health, to stimulating sleep innovations, to optimizing sleep interventions at the personal level.