For book/ebook authors, publishers, & self-publishers
All authors want to know when other sites, blogs, or online stores mention them or their book. Keeping up with all your latest mentions can be time-consuming, however. To make this task easier, and automated, try Google Alerts. Set up an alert for a specific name or phrase and you'll receive email notification when it appears on the web or in Google news. You can receive your alerts daily, weekly, or as they occur.
Currently I have several Google alerts set up, one for my name and one for each of my most recent books. Although some of the alerts are rather routine, I've found sites mentioning me that I otherwise wouldn't have discovered so quickly.
A Google alert is also a great idea if you've just issued a press release about your book. Create an alert for a phrase in the title or text of your release that should be relatively unique online. This will give you a good idea of how effective your release is in terms of online visibility.