The number one most successful way to sell products online is to build a website of your own and expand from there onto different channels, like Amazon, eBay, and more. You will need a shipping method to get purchases to your customers, and at least one means of taking payment remotely. To build this into a successful business, you~ll need to promote and market your store and always keep up on customer service, so it~s important to build your online store with the right software — preferably, an eCommerce-focused website builder with tools for managing products and customers as well as the other aspects of your business.