This video shows you in less than 60-seconds how to time your sleep so you wake up feeling rested and ready for the day.

Using the 90-minute rule, most adults will need to sleep either six or seven and a half hours every night.

For some, it may be necessary to set an alarm to ensure waking at the proper time. It's also important to resist the urge to hit the snooze button. Those extra minutes allow your body to start another sleep cycle which is interrupted when the alarm goes of again.