I know you want to make money with Adsense. But unfortunately along the way, many of you either got your Adsense account banned or have your domain blacklisted or disabled from showing ads for some reasons; for instance trying to improve its click through rate.
For those of you who want to check whether your domain was blacklisted or disabled from showing Google Adsense, then go over to this preview tool called Adsense Sandbox: http://www.labnol.org/google-adsense-sandbox/
Type in your URL, select your country and click "Show Google Ads". If it shows a blank screen with the ad formats which you used on your site. For instance, Leaderboard 728 x 90, Banner (468x60), Square (250x250), etc.