This paper describes a program that enhances one of the most important and challenging tasks of life: staying happily married for a lifetime. The PREPARE/ENRICH Couple Program is a program for premarital and married couples who want to get their marriage off to a good start or enrich their marriage. The couple inventories and program have high levels of reliability, validity and clinical utility. A typology of couples identifies four premarital types (vitalized, harmonious, traditional and conflicted) and a fifth marital type (devitalized). A Couple and Family Map is used to describe the couple relationship and family of origin. Four personality scales (assertiveness, self-confidence, avoidance and partner dominance) are included in Version 2000. This paper describes the couple assessment scales (PREPARE, PREPARE-MC, ENRICH and MATE), materials provided to the couple and to the counselor, six goals of the program and integrated couple exercises. (Author abstract)