Google has automated staying on top of your common searches (be they web, news, or groups) with their new Google Alerts feature. I’ve been using this feature for some time now and find it really helpful. You can set it to run every day, every week, or as Google notices changes.
For instance, set an Alert for links to yoursite.com on the web, or for when someone mentions Nikon D70 in a news article or on the web.