Submit your book review as a press release to all your local media (newspapers, magazines, radio, television news, etc.) If your book appeals to a specific niche, make sure you submit your press release to any publications online, or otherwise, which cater to the demographic of your readership. Don't forget to use online free press release services to help spread the word.
If you've received a positive review from a reputable review agency, make sure you put it out there where potential buyers can see it. Use a quote, or an excerpt of a quote for any future print runs of your book. Don't forget to credit the source of the reviewer; if you've received a great review from the New York Times, then you want to make sure everyone knows about it!
Banners & Signage
If you're attending book-signings at festivals or other venues, you'll want to create professional looking signage. Banners and signs are a great place to promote positive reviews of your book. Take the time to do this well. Professional looking banners with sturdy banner-stands are eye-catching and can do wonders to create a professional image for you and your book. If a banner is impractical, or out of the budget, you can also print professional looking signs to place inside plexiglass frames.
Do you have a blog? Great! Post your review there. Don't forget to share your review on your Facebook, Twitter, Google + and LinkedIn pages. Make sure to use #hashtags to increase your post's visibility. Go ahead, be shameless, and ask your friends and family to like and share your posts.
Amazon's Editorial Reviews
The Editorial Review Section on your Amazon Author Central profile was created to help you bring attention to your professional reviews and literary achievements. This is a great place for sharing your success as an author!
Post your reviews in your GoodReads profile (go to your dashboard to do this). Also, don't forget to blog the review in GoodRead's blog section.
Your Barnes and Noble Profile
Post your review in the section entitled: More About This Book. Take the time to get this right the first time though, because Barnes and Noble does not make it easy to edit your posts here.
Post all, or a portion of your all your positive reviews on your website. Don't forget to include images and logos (with permission) to help bring attention to those reviews which have been provided from reputable and well-recognized agencies. If you have a media page include a PDF of your review which can be downloaded directly from your site.
Your sell-sheet is the perfect place to include reviews of your book. A sell-sheet should include pertinent information for bookstores, libraries, and buyers to tell them why and how to purchase your book.