Want to not only fall asleep quickly but also stay asleep longer? Sleep scientist Matt Walker explains how your room temperature, lighting and other easy-to-fix factors can set the stage for a better night's rest.

Sleeping with Science, a TED series, uncovers the facts and secrets behind our nightly slumber. (Made possible with the support of Beautyrest)

Check out more: https://go.ted.com/sleepingwithscience and subscribe to the TED channel: https://www.youtube.com/TED