New data from 400 eCommerce sites highlights the best techniques to test to optimize a checkout page to increase the email subscriber opt-in rate. This has the dual benefits of increasing sales through cart abandonment rates and customer emails. Sites which positioned the email field in the top 3 fields on the checkout page achieved a 14.6 higher email capture rate, compared to those where the email field was in a less prominent position. Sites that have multiple checkout pages were punished by users for not being as simple as they could be. Email capture rates of sites with a single checkout page were 16.7% higher than the capture rate on sites with multiple checkout pages. It may be worth simplifying the customer journey so you only need the one checkout page.