A very informative blog, and if you don't have time to run your own blog tour they have services for that too!
http://www.bookbuzzr.com/blog/

http://www.bookmarketingbuzzblog.blogspot.com/
http://bookmarketingbuzzblog.blogspot.com/2012/04/33-twitter-tips-for-authors-book.html

By the Huffington Post - good article. http://www.huffingtonpost.com/lev-raphael/bad-book-reviews_b_1656083.html?utm_hp_ref=books

http://blog.infinitypublishing.com/bloginfinitypublishingcom/bid/63448/Fifty-Things-Under-50-Bucks-To-Promote-Your-Book

Top 20 online sites to post for your PR efforts:

http://savvybookwriters.wordpress.com/2012/03/11/18-top-websites-to-promote-your-book-for-free/

This is a page on Facebook that when linked to provide a wealth of information to Authors, readers and some PR besides for Authors. Take the time to check them out. Their information is very useful and informative.

A very interesting article about Indie Author experience and lessons learned. She also has a lot of other useful insight around her site. This one is about paying for advertising and PR and could in the end save you indies a lot of money.

http://www.indiesunlimited.com/2012/06/11/to-pay-or-not-to-pay-that-is-the-question/

The following is a book reviewer. They have nice, down to earth reviews and good source to get honest reviews for books you want to read and for the writers.

http://www.jeanbooknerd.com/p/reviews.html

This is a great article with a lot of great links to help concerning Facebook. I wish I'd known this when I started my Facebook Page. I lost my page twice because it wasn't obeying one of these rules. And all the fans that I had went with it!

http://www.marketinggum.com/what-you-cannot-do-on-facebook-page-admins-read-these-rules/