Respond with personalised comments rather than a generic Thank You. Fostering a conversation helps build the credibility of 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.
Share your personal experiences on your blog occasionally. It makes your posts more real and helps your readers connect with you.