Write something useful for your readers. Share a relevant piece of information, an event update or a hack that makes a task simpler
Blogging is all about sharing; no matters if the blog post is written by you or not. Keep spreading the good vibes for your readers.
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.