Coding your Ads with tracking numbers etc. can work...

But Thought a few may be interested...

You can now Do it using Google Analytics. Sophisticated. Easy. Free.

Web Analytics Can Track Offline Campaigns, Too

http://www.clickz.com/showPage.html?page=3623461

http://www.google.com/analytics/index.html
http://www.google.com/analytics/conv...niversity.html

Phil