SLEEP. YOU'RE NOT TOUGH BECAUSE YOU'RE TIRED...

Sleep.
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There was a time when the narrative was, "You can sleep when you're dead."

That, somehow, it was virtuous to grind and go through life like a zombie. Burning the candle at both ends.

That mindset couldn't be further from the truth.

Once you start paying attention, you will see how much poor sleep can negatively affect your overall performance.