So, don't put "I think" in the post then?? Just asking so I can get better.
From my education (journalism major.... Take it for what its worth haha), i was taught to avoid using "I think" and "in my opinion."
The statements will still come across as your opinion and it shows the reader that you have more confidence in your opinion.
Since it is simply a blog post there aren't all that many rules but your writing would be stronger if you didn't notify the reader that an opinion follows.
I'm not trying to act like the best writer in the world or anything but if you would like someone to proof your work I'd be happy to if I am not busy.
EDIT: you can get away using "I think" or IMO once maybe twice, my point is to not be redundant.