If you've taken my classes, these tips on advertising with Google's AdWords from the New York Times will probably sound pretty familiar to you:
Check it out here.

-  Begin by casting a narrow net, advertising in your local market and then expanding to additional markets like Google’s AdSense network. 
-  Try to choose keyword terms that your competition has overlooked to keep per-word costs low. 
-  Remember that good campaigns require constant adjustment. 
Check it out here.
