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50 Everyday Mistakes—and How to Fix Them

Reader's Digest Logo By Brandon Specktor of Reader's Digest | Slide 1 of 49: Humans sleep in five-stage cycles. Waking up in the middle of a REM stage (when you sleep deepest) leaves you groggy and grumpy—but get up during one of your light-sleep stages, and you’ll rise feeling refreshed and alert. Find your perfect bedtime with a free site such as sleepyti.me, which gives you four optimal bedtimes based on when you need to get up, or a sleep-tracker app such as Sleepbot, which uses motion and sound sensors to wake you from the lightest phase of your cycle. These are the <a href="http://www.rd.com/health/wellness/stages-of-sleep/">four stages of sleep and the importance of each</a>.

Setting your alarm for the middle of a REM cycle

Humans sleep in five-stage cycles. Waking up in the middle of a REM stage (when you sleep deepest) leaves you groggy and grumpy—but get up during one of your light-sleep stages, and you’ll rise feeling refreshed and alert. Find your perfect bedtime with a free site such as sleepyti.me, which gives you four optimal bedtimes based on when you need to get up, or a sleep-tracker app such as Sleepbot, which uses motion and sound sensors to wake you from the lightest phase of your cycle. 
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