To effectively manage CMKs, consider the following best practices: - Regular Updates: Regularly update your customer data to keep it accurate and relevant. - Data Privacy: Ensure that your data management practices comply with data privacy regulations such as GDPR. - Integration with CRM: Integrate your CMK system with your CRM to ensure seamless data flow. - Analytics: Use analytics tools to gain insights into customer behavior and tailor your email marketing strategies accordingly. - Data Backup: Regularly back up your CMK data to prevent data loss.