11. Copyright:

Be extremely cautious with the use of images! Have you utilized data or pictures of some source? Have you set the credits to that source?

12. Internal links.

Try to link every post with another post on your website.
You can select a keyword in the post which attends another post. Have you done that?

13. External links:

Google cherishes associations. Have you made, no less than, one outer connection.
Think of a science article or a Wikipedia page. Some additional information to your blog.

14. Internal and external links:

Are all your links clickable and are the external links opening into a new tab?
Check them all in the preview mode.

15. The description:

When Google shows your post, it doesn't always take the filled in meta description, yet
the main lines of your first paragraph. Remember that, when you write your intro.

Google can be extremely stubborn and capricious