1 per day: If you have just started blogging, then writing consistently might take time. So set a target to have 1 post per day that is well researched.
For Business Blogs, include product messages in your blog posts clubbed with engaging content .This increases your social shares.
E-commerce bloggers must carefully write keeping their audience in mind. Everything you post on your blog will speak for your product or service. Your interaction with bloggers in comments and otherwise will give you a direction.