Buffett reveals his key rule for middle-class Americans - it could change your finances

Warren Buffett financial advice: Warren Buffett shares a simple habit for financial stability. He advises paying yourself first by saving and investing before spending. Avoid wasteful expenses and live below your means. Buffett suggests investing in a low-cost S&P 500 index fund for long-term growth. He also warns against consumer debt. Personal growth is highlighted as the best investment.