On: You don’t have time to maintain your blog

[hippo33]

Actually, those are correct. "a couple writers" and "a couple of writers" are both grammatically correct.

"its completion" -> "it's completion" is just wrong. "It is completion" is not the intent of the sentence.

[jabbernotty → hippo33]

You are certainly right about the "its". I have an annoying habit of incorrectly correcting people.