If you are selling multiple affiliate products (which is also very good strategy), then you can build a store in order to sell them from. That means that you’ll be highlighting and promoting products that are relevant to your brand as you might do in an ecommerce store. The only real difference is that when the buyer clicks on your item, they will now instead be taken to an external page.
This is simple to do: for example, you can do it by using the WordPress-friendly ecommerce plugin called WooCommerce. This will allow you to create a store from your site where people can view items. It supports affiliate content, meaning that if someone clicks on an item, they will be taken to the new page using your referral link.