One good way to get noticed is to send something called an "@message" to top Twitter users. Here's how it works. If you and your friend both have Twitter accounts and you both follow each other, you can send direct messages to each other that aren't for public consumption. But you can also send "@messages" to anyone you want, whether you follow them or not, or they follow you or not. Got that? Here's where it gets good -- an "@message" is posted on your profile page for all to see. So if you wanted to send an "@message" to top Twitter user actor Ashton Kutcher, anybody visiting your profile would see it. Good luck getting Mr. Kutcher to send a tweet back to you, but that's not the point. But if he does feel the urge to re-tweet your message -- or broadcast it to all his followers -- 2.9 million people will see it (as of July 30, 2009).