Sleep is one of the most fundamental and basic things humans do.
If we don't get enough, terrible things begin happening to our minds and bodies. And if we don't get any sleep after too long, we'll literally die.
But many find it extremely challenging to not only get an adequate and consistent amount of sleep every night, but to do it well.
Business Insider previously turned to an expert - sleep scientist Patrick Fuller, an associate professor of neurology at Harvard Medical School - to get some answers.
He gave us the lowdown on what he does to ensure a good night's sleep every single night.
While this routine works for Fuller, it may not be feasible for everyone's lifestyle and schedule. But Fuller says that this schedule leaves him feeling happy and rested.
Here are seven things he does to ensure a great sleep every night.
Julia Calderone wrote a previous version of this post.