Forgotten that password?
Have you forgotten that password, and the email address that you registered with, or worst still, deleted the email due to annoying spam?
Then you need a Password Manager! One I've been using for the last few years is RoboForm, there is a free version available that allows you to store up to 10 logins, but you'll soon pass that figure. Then the cost rises to $30 for a single computer or an annual $20 for multiple computers.
An alternative I've recently found out about is KeePass which is a free open source password manager. It looks good and I'll probably switch to this when my existing RoboForm subscription expires.