We know today that 52% of marketers plan to increase spending on email marketing and 68% believe email is core to their businesses. Before sending your next email, pause for a few minutes and ask yourself: What is the goal of my email marketing? Is it to grow my subscriber database? Generate more leads? To convert more existing leads into customers? Whatever you decide your goal is (and you can have more than one), the next thing you need to do is figure out which metrics you'll need to track in order to determine how you're progressing toward that goal.