If you haven't deposited enough time in your sleep bank for the night, Behar suggests heading back to bed-with one exception. If your alarm is set to wake you in 90 minutes or less, stay up, he advises. A complete sleep cycle takes around 90 minutes, and interrupting one can lead to sleep inertia.
Waking up early isn't always a bad thing, Dasgupta maintains. If you're finding yourself staring at the ceiling 30 minutes or less before your alarm, it's a good sign that your sleep schedule is aligned with your circadian rhythm.
Even if you can't fall back asleep fully and drift in and out of consciousness, you're likely getting more shut eye than you think. What's more, relaxation is almost as good as sleep.
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