Don't worry if you forget your username or password - you will still be able to access your account.
Go to "Sign In/Register" on the top of your browser window and click on the link "Forgot your password?" After entering your e-mail address you will receive an e-mail with a link which enables you to change your password. Please click in the link provided in your e-mail and simply enter the password you wish to have. This will enable you to access your account again immediately.