Removing yourself from the internet is not always an easy task, and the biggest problem is tracking down all your online accounts so you can delete them. Just Delete Me is a site that provides you with direct links to doing just that.
Just Delete Me is a list of the most popular web apps and services with links to delete your account from those services. Each one is colour coded -- green is easy, yellow is medium, red is difficult, and black is impossible. When you click on a service, you're automatically taken to the page where you can delete your account so you don't have to go searching for it.
Likewise, you can snag the Chrome extension and be taken to the account deletion page right from the URL bar when you're on a site, as well as get up-to-date information about whether an account is easy to delete before you sign up. If you want to keep track of your accounts and delete as many as possible, this is a good place to start.