1. Data Collection: Gather data from your email marketing platform, including metrics like open rates, bounce rates, and click-through rates. 2. Segmentation: Divide your list into segments based on engagement levels, demographics, or other relevant criteria. 3. Verification: Use email verification tools to identify and remove invalid or risky email addresses. 4. Analysis: Examine your key metrics to identify trends and issues. Look for patterns in engagement and performance. 5. Cleaning: Remove inactive subscribers, invalid emails, and those who frequently mark your emails as spam. 6. Updating: Regularly update your list based on new data and feedback.