That’s exactly what the gang at the Adsense Blogspot have done. Make sure that your ads are in the hot zone. As the post quite rightly points out, the closer the ads are to the hot zone, the more likely they are to be clicked, which is what will increase your income.

The most general tip I can give is that an ad placed above the fold is “hot,” and one placed below the fold is “cold.” I’m not sure if that rhyme at the end will help you remember this, but I sure hope that it does. Beyond that, you need to start thinking about your site design in order to create the “hottest” ad placement.

They also included a link to their heat map, which, if you haven’t seen it already, is a must.

Basically get the surfer to see the ad. Especially important is placement above the fold. If the surfer is leaving your site anyway, why not get him to click on an ad? Might as well make a quid or two off the cheeky fella. :)