Its not just good content that matters, presentation of post is very important too. Have attractive pictures, fonts etc to hook the readers.
Be clear about your goals for blogging. Maintaining a blog is laborious. And your goals will keep you motivate!
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.