Warren Buffett may be worth billions, but he had a stark reminder he sent every two years in a memo to his managers: reputation and planning for the future should take precedent over profit. It’s a lesson that’s worked wonders for Buffett as he’s led Berkshire Hathaway from a company with roots dating to the 1800s —to a trillion-dollar enterprise today.

Warren Buffett is widely considered one of the smartest minds in business —after all, he’s spent decades maintaining Berkshire Hathaway as a multinational investment powerhouse.

Even though he may seem like an easy-going, Coca-Cola-loving old man, he admits his leadership style can sometimes be “ruthless.” In fact, the billionaire sent a stark reminder to his manager every two years of his nonnegotiables, which include “to z

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