Most email service providers offer account recovery options such as resetting passwords or answering security questions. Look for these options on the sign-in page of your email service provider's website and follow the prompts provided.

Google can help you recover access to your account by asking a series of security questions to verify your identity. Important: To recover an account for a child under 13 years: Learn how to reset your child's password. To recover a work, school, or group account: For help, contact your administrator.

Go to http://accounts.google.com/signin/usernamerecovery and enter any email accounts or phone numbers that you've had for a while and which may have been used as recovery info. The “find your email” page can help you locate any forgotten Google accounts.