No email-adress. You can't remember your email-adress.
Don't panic yet..
If you provide us with as much information as you can remember, then we'll try and help you reset your password.

Haven't provide us a telephone number or other credentials?
Oh dear.. this may be the time to start panicking.
You might be better of registering a new account.
When you do, be sure to set some extra credentials (on the profile page!)
so we can help you next time to restore your account.

I remember a...