Remember that content is the key to a successful blog, Quality scores over quantity in getting audience to your blog.
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.
Write something useful for yours reader. Share a relevant piece of information, an event update or a hack that makes a task simpler.