Warren Buffett once shared his thoughts on the most important investing rules: "The first rule of an investment is don't lose money. And the second rule of an investment is don't forget the first rule." For investors looking to become richer, sometimes it's best to keep it simple and lean on proven blue chip stocks in their quest to follow the first rule.

Coca-Cola (NYSE: KO), Berkshire Hathaway (NYSE: BRK.B), and (NASDAQ: MSFT) operate in different sectors but are all prime examples of what sustained success looks like. They won't make you rich overnight, but when you look back a decade from now, $100 investments into each will most likely have improved your portfolio.

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Source Fool.com