Dividend stocks should ideally be buy-and-hold investments that you can forget about in your portfolio. You shouldn't need to constantly check on those businesses to see if their payouts are safe or if their dividends look sustainable. If you do, that's a sign that perhaps you've picked stocks that are too risky. 

Cardinal Health (NYSE: CAH) and Cisco Systems (NASDAQ: CSCO) are two high-yielding dividend stocks that you won't need to worry about in your portfolio.

What makes Cardinal Health a safe stock is that it's in the business of distributing medical and pharmaceutical products. It isn't a risky biotech stock, nor is it dependent on a single product. It has a broad reach, serving almost 90% of U.S. hospitals and 60,000 pharmacies.

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Source Fool.com