Your writing quantity and quality so far...

Try copying and pasting all your blog writing into a Word document, then count the number of words. See if there are any mistakes that you make regularly. If so, try correcting them and remember to avoid that mistake in future.
In a new blog post, record your data, e.g.:
I have written 15 blog posts and 4500 words. That's 500 words per week over 9 weeks. My most common mistake was to forget to put in a space after each period, comma, semi-colon, and colon.