Six reasons people do not buy from you, and the first is that you keep telling them how good your products are. Lisa Torres lists the rest without softening any of them, including being too pushy, asking the same people over and over, and having nothing in your life to talk about except the business.
Her blogging advice follows the same line. Decide the purpose of a post before you write a word of it, then write to that purpose. It is a small discipline and it changes what ends up on the page.
The nutrition side is the surprise. She sells a meal replacement and reviews it, then writes a separate post explaining why somebody should say no to the cleanse version, which is not how a person behaves when they only want the sale.
Food addiction gets its own honest treatment, and there is a raw cracker recipe with pictures.
Read the six reasons post first. It will make you uncomfortable, which is how you know it works.