How to talk about a book in 2015

I just received an advanced copy of a book. The author thought I might like it, and so the publisher sent it along. It's very possible that I will like it, but there's always the chance I might not. I'd like to write something about it, but I'm not entirely sure what the best approach would be these days.

Do I just write a single blog post with my thoughts, upon completing the book?

Do I write multiple posts talking about the book as I read it?

Do I try to pitch a review somewhere else, knowing that this book was probably sent to many places and lots of people will have thoughts about it shortly? (No NDA was listed. I'm fairly sure I can talk about it right now).

Do I just tweet about it? Live-tweet my reading, like it's a new show on Netflix? Would that be most effective?

I honestly have no idea. Is a series of negative tweets better than a somewhat positive review post? Is attention the most important thing? Praise? Poise? Social media has me very confused about what official entities want out of regular people.