Here’s a couple quick ways to keep up with the latest trends in your industry.
Set up a custom news feed with Google
Go over to http://news.google.com and type in your phrase. This will bring up all the latest news that mentions that subject. If you need a specific phrase, make sure you put it in quotes.

Then click on the RSS button in the lower left corner and sign up for this custom news feed. Now every day you’ll have the latest news about your industry right there in your RSS reader.
Over time, you’ll see mentions of related items that you don’t want to read about. I suggest you go back to the Google News page and rewrite your query, using delimiters such as the plus and minus.

Get Google Alerts
While the Google news thing is cool, it’ll only give you updates on actual news items that have been submitted. Since many people are publishing items in formats besides press releases, we want to be able to capture these additions to the web, too.
To do so, we’ll set up a Google alert with our same phrase(s).
Go to http://www.google.com/alerts and you’ll see this page:

In the “Search Items” box, put in your same search criteria that you used on the news site. You can use quotes and other delimiters just as you did above.
Depending upon how often you want these alerts, choose the correct option in the “How Often” area. If you’re running a news site, you’ll want to put the “How Often” to “As it happens”. That way you can get that info onto your website as soon as possible. If you are just trying to keep up with trends, leave it at “once a day”.
Now plop in your email address. Now every time Google indexes a new page on the Internet that includes your specific phrase, you’ll get an email.
You can use these same methods to keep an eye on your competition as well, your own business name, or even mentions of specific products that you carry. Watch for bloggers that are mentioning your business and drop a comment on their site. They’ll be blown away that you visited their blog and you’ll have an even stronger chance of getting future referrals from them.
By the way, this should not be confused with Google Trends, an online way of watching search trends over time. That’s a nice tool too, but not what I was going for here.