Ooops, I've forgotten my password....
No problem.
On the login screen just click the Forgot My Password link. It will ask you for your username and your Password Hint. This is set to that little bit of additional information I asked you for when creating your account.
If you get them both correct then your password will be reset, and you will get sent an email to your registered address with the new password. Log in and change it to something more memorable this time!