Buying dividend stocks is one of the best ways to beat the market long term. Stable dividends can be even more valuable than just a high yield, which is why DuPont (NYSE:DD), 3M (NYSE:MMM), and Procter & Gamble (NYSE:PG) are three of the most valuable dividends on the market. 

DuPont's agriculture business allows for the stability that's paid a dividend since 1904, 3M's innovation has led 97 straight years of dividends, and Procter & Gamble has paid its dividend since 1890. 

Erin Miller sat down with Travis Hoium to see why these are such great dividends and why investors should get in for the long haul.

Erin Miller has no position in any stocks mentioned. Fool contributor Travis Hoium manages an account that owns shares of 3M, E.I. du Pont de Nemours & Company, and Procter & Gamble. The Motley Fool recommends 3M and Procter & Gamble. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.