Influential investor Warren Buffett has been doling out investment advice since the beginning of his career. A staunch advocate of value investing in large-cap, well-managed equities, Buffett once said, "If you don't find a way to make money while you sleep, you will work until you die." Investing in high-quality dividend stocks can help you generate substantial passive income, creating a sturdy cushion for retirement as well as side earnings. Companies categorized as dividend aristocrats have a decades-long history of periodically distributing dividends, making them a good source of income during turbulent market conditions and recessionary fears. Buffett, who currently ranks No. 5 on the Forbes real-time billionaires list with a net worth of $114 billion, is a stalwart supporter of industry-leading blue chip stocks. "Beware the investment activity that produces applause; the great moves are usually greeted by yawns," Buffett once said.