Maintaining consistent data requires ongoing effort: 1. Regular Audits: Conduct regular audits of your database to identify and correct inconsistencies. 2. Subscriber Preferences: Allow subscribers to update their preferences and information to keep data current. 3. Feedback Loops: Use feedback from email campaigns to identify any data issues and rectify them promptly. 4. Data Integration: Ensure seamless integration between your email marketing platform and other systems (like CRM) to maintain data consistency.