Usually, I was logging out for some reason. Whenever I try to login I get a message "Invalid email or password". Usually, I forgot my email address or password. There's a way to change password if I forgot. But, what if I forgot my email address.

I really forget my email address some time (It might sounds funny to some people. But, I really forget email some time). But, I was thinking if there was a button "forgotten email address". User have to choose username but, that's available publicly so, I think it would be better if user have to guess email address either. They should get 3 (not more than 5) chance. If they put wrong password than, block him for an hour.