"Reminders" (timely notices about specific clinical events to physicians or patients) are useful strategies for implementing clinical guidelines. These systems can vary widely in content, design, and purpose. This variability makes it difficult to compare systems or predict a reminder's efficacy in a particular setting. In this article, the authors suggest that too much attention has been paid to proving the efficacy of reminder systems as a general strategy or a comprehensive solution. Rather, the usefulness and effectiveness of reminder systems will be better appreciated when quality management principles are applied to designing, implementing, and maintaining them. Physicians must participate in finding the best solutions for clinical process problems, and reminder systems--when implemented as the "best solution"--must be monitored and improved continually on an ongoing basis to continue to meet physicians' needs.