With addresses on email lists turning over every three years, growing email lists must be a priority for marketers. Good list maintenance will help reduce churn while giving you a more accurate view of your delivery, open and click-through rates. A clean list also will ensure that you're in compliance with CAN-SPAM laws. Growing and maintaining lists is not difficult, but it does take effort. To make the process easy, I've developed five New Year's resolutions for growing and maintaining email lists.