At the time, Obama reminded Clinton of when they campaigned against each other over eight years before. In 2008, they often wound up lodging in the same hotels while in Iowa or New Hampshire.

“He said his team would be finished with dinner and getting ready to call it a night when we finally got there, completely spent,” Clinton writes. “By the time he woke up the next morning, we’d be long gone. In short, he thought we overdid it.”

Recalling this time in both their lives, Obama offered her advice: “‘Hillary,’ he said, ‘you’ve got to pace yourself this time. Work smart, not just hard,'” Clinton writes.

He would repeat the same advice her whenever they saw each other, Clinton writes, adding that he would also ask John Podesta and Huma Abedin to pass the message along to Clinton.

“I tried to follow his advice. After all, he won twice,” Clinton writes.

Therefore, she decided to change her approach to her overall wellness. “At the beginning, I put some routines in place to keep my traveling team and me as healthy and productive as possible through one of the hardest things any of us would ever do,” Clinton writes.

To top it off, Clinton says she urged everyone on the campaign to try their “best to savor every moment” that went their way and simultaneously “find joy and meaning in the daily grind of campaigning.”

“Not a day went by when we didn’t,” Clinton writes.

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