We've listed the top ten, we are sure there are more.
1. Posting 15 times only.
2. Refusing to include links
3. Posting with type that can not be easily read
4. Posting with only a few lines of type
5. Posting to market products without human interest articles available on the blog as well
6. Foul language makes people think you can't think
7. Including jpgs. that are not adapted to internet browsers
8. Ignoring the importance of visual interest. Although people go to blogs to read, they still need a bit of visual interest to keep them entertained.
9. Blogging constantly about negative topics. Not everyone wants to be depressed with your problems.
10. Not taking any responsibility for the kinds of things you blog about, it is highly unprofessional