For example, you might consider a limit of one or two hours a day and, for a better night's sleep, no screen time in the hour before bed.

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Along with others, he began drilling a 2, 000 foot hole into the ground, working three or four days at a time with no sleep.

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And he is here today, with no time to prepare and no sleep.

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The researchers found no harm in permitting children to cry for limited periods of time while they learned to sleep on their own.

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