Let's face it: Your website is central to your e-commerce business. Upgrading your website is one of the most important things you can do to bring in new customers and sell more products. Sometimes, though, it's difficult to know exactly how to improve your site. To help you out with that dilemma, here are three ways to refresh your website and boost your business without breaking the bank. The overall design of an e-commerce website has a big impact on customers -- and sales -- so regularly rethinking and tweaking your site's design is vital.