The difficulty there is to get the wake-up time right.

但难点在于怎么控制你醒来的时间。

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The 10-Minute Rule . If you want to stick with a consistent wake-up time, practice the ten-minute rule.

10分钟原则： 如果你想养成同一个时间起床的习惯，可以试试10分钟原则。

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Choose a bedtime and wake-up time that work for you, and follow the same routine each day, even on weekends.

选择一个对你有用的睡眠时间和起床时间，每天按照这个时间做，即便是在周末。

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Most adults need 7-9 hours of sleep every night, so take a look at your wake-up time, and do the math.

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