Gmail is deleting all accounts that haven't been used for 2 years on Friday so if you have an account for signing up for spammy things or something you might want to log in and log out really quick.
The nice thing is that Gmail sent out warnings with the names of the accounts.
I asked them to do that years ago after a catastrophic password loss. I wanted to know what all of my Gmail accounts were.
They refused quoting security risks.
Got what I wanted eventually. :-)