Research: Use blogs that publishes content that is based on research ans is relevant to what your topic is.
Originality - Focus more on the originality of content and on a consistent basis. It is a habit you will need to cultivate.
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.