Lisa, an elementary school teacher from Ambler, Pa., came home from work one day and said to her husband, “Honey, guess what? I landed that summer teaching position I wanted!” “Wow, congratulations!” he replied. “I know how hard you worked to get that job. I am so happy for you! You must be really excited.” The way Lisa’s husband reacted to her good news was also good news for their marriage, which, 15 years later, is still going strong; such positive responses turn out to be vital to the longevity of a relationship.