What you do before going to bed has no effect on how you feel the next day.
All devices' screens give out a large amount of blue light.
Blue light helps the body produce more of the sleep hormone, melatonin.
Poor sleep quality can make it difficult to get up in the morning.
Not sleeping well is especially bad for teenagers because their brains are still developing.
A lack of sleep makes it easier for students to concentrate and get good grades at school.
The author suggests leaving your phone in another room and rediscovering paper books before bedtime.
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