Let’s put the theory aside for a minute. When it comes to having a successful, long-lasting relationship, what has actually worked for couples whose relationships have stood the test of time? In order to celebrate their 40th wedding anniversary, Marlo Thomas and Phil Donahue interviewed 40 famous couples in successful relationships, to discover the actual rubber-meets-the-road strategies that they use to navigate life’s challenges. The result – their bestselling book What Makes a Marriage Last – has such a diverse amount of wisdom in its pages that you’re sure to find something new to add to your relationship skillset. Plus you’ll get a sneak peek behind the scenes into the intimate lives of some of America’s most beloved couples.