AdSense ads that are placed in the header of the page seem to do fairly well. The placement is great to catch the eye of your visitor, but as you may have heard the term before, many users become "ad blind" and they will tend to overlook ads placed in the position. One way to avoid this common problem is to place your AdSense ad underneath the header of the page and into the actual content of the page. If you are able to divide your content into sections, this will work nicely since it will look symmetrical and blend nicely.