Wake Up Without an Alarm Clock

Of all sounds (including fingernails screeching down a blackboard and the shrill tones of the Emergency Alert System), few are as obnoxious as those of an alarm clock.

Human beings have survived for most of our history without these confounded noisemakers —so why would you need one now?

Using your natural circadian rhythms and employing other environmental signals other than sound can help you wake up without an annoying alarm.

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