How to Get Your Cancelled Adsense Account Back

1. Ensure that you did not break any of Google's policies of having an Adsense account. Some of the prohibitions include asking others to click on a link to a site via social network, clicking links yourself and using copyrighted material on your site. Review the full list of policies at their website. (see References 1)
2. Visit the website to appeal your Adsense account's deactivation. (see References 2)

3. Fill out the proper fields and wait for Google's reply. If your appeal is denied, you may not have the choice of activating a new account.