• You can do interviews, post info about your book, write special blogs, talk about what makes you different than other writers.
• It is however important to meet their deadlines and if you can’t let them know as soon as you can.
Here's two sites you might want to check out
Try blogging for Savvy Authors - If you're interested in scheduling a date please contact : firstname.lastname@example.org
Long and Short Review allow author to blog for free. http://www.longandshortreviews.com/ads.htm