Sometimes the directions for closing an account on an online service are buried deep in a web site and impossible to find. WikiCancel is a wiki page that lists the cancellation procedures for popular services, subscriptions, and contracts.
WikiCancel works like any other wiki page. Click a link for a service you want to close, and WikiCancel shows you exactly how to do it. That in itself is handy, but WikiCancel also shows you how to cancel magazine subscriptions, and walks you through the closing contract services like a cell phone or internet. For contracts, it also usually includes the ways you avoid the cancellation fees when closing your account. WikiCancel is a wiki, so if it looks like a few services are missing, feel free to add to the list to make it better.
For guides about closing other online accounts check this page as well [accountkiller].