You can increase your CPC by reducing the number of lower-paying Adsense ads. You can use the AdSense competitive filter mechanism to filter out the ads that you don’t want to be shown on your web site. It is suggested by others that showing fewer ads on a page will result in higher-paying ads displayed on your web site. A lot of publishers report that they make more Adsense income if they remove ads completely from pages with few or no clicks. Again you have to test whether this strategy works in your favour or not.