E-commerce bloggers can gradually choose to write curated content from other websites/blogs. That always helps because a buyer will generally not spend much time surfing. He/she will appreciate it if you provide most of what they are looking for.
Series of articles - Create a series of articles on your blog if the subject you choose to talk about is an extensive one.
For Business Blogs, include product messages in your blog posts clubbed with engaging content .This increases your social shares.