Taking a look at what the biggest in the online world are doing  can be a  good guide on how to run your ecommerce site.

Invesp took a look at what the top 200 ecommerce websites are doing from a design standpoint.

Things such as return policy, continue shopping in the cart, and button sizes were some of the design tactics that most sites shared.

Hopefully this checklist will help you with some things  you did not think about before.