Not Updating Your Blog
Commonest mistake we do is that we do not update our blog on regular basis, doing this we loose interest of our readers.

Blogging Only for Money!
Some of us blog just for money and doing this create crap articles and reviews that worth nothing and this not only make our blog unpopular but also useless.

No Interaction with Readers
Some times we are so much busy that we do not reply to the comments of our readers. Doing this we loose our reputation in eyes of the reader.

No Proofreading and Copied content
If you are relying on copied content to boost your blog, then you are absolutely wrong! Such type of content is already rated by search engines so they do not rate it again. Also do proofreading every time you publish something as command over language impresses readers.

Writing for Search Engines Only
Many of the newbie bloggers writes for search engine only and forgets the readers. This really hampers the growth of the blog.
Not doing above mistakes can not only boost the traffic to your blog but also popularizes it. So happy blogging!