Ellen McCarthy—feature writer for the Style section of The Washington Post and author of The Real Thing: Lessons on Love and Life from a Wedding Reporter's Notebook—discusses the keys to a happy, healthy marriage, including:

1. What is the key to a good romantic relationship?
2. How can a couple make marriage last a lifetime?
3. How can a couple use arguments for the good of the relationship?
4. What should a single person keep in mind when searching for a healthy relationship?