There are a handful of your pages where most visitors leave your site (you should be able to find out which pages through your web stats). Try presenting targeted pop-up offers to these people as they leave your site, and earn commissions on the traffic you're losing.
Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as NotePad) and save (Control-s or Apple-s).
