With 2015 kicking off, we have entered a year when marketers have more options than ever before to reach their target audience. So what channel tops the list for having the best ROI? According to a study Direct Marketing News shared, 60% of marketing executives polled chose email marketing as the number one tactic. Next up was social media (26%) with SEO (25%) and offline direct marketing (20%) following. How do marketers define success with email marketing? Click-through and open rates were the two most common metrics. But just because email marketing may see a surge this year, that doesn't mean all other channels should take a backseat. The best way to really maximize ROI is with an integrated effort.