If you cannot log in their are multiple options:
Use the Password Reset form to reset your password. You will receive a confirmation email with a link and a verification code which will allow you to reset your password. Note: In some case this process can fail depending on privacy settings in your browser.
Create a new account. As a last resort, if you are unable to log in and need to access resources such as firmware downloads that require that you are logged in you may create a new account and log in using the new email/password combination. Simply use an alternate email address to create the account. This will not adversely effect your existing account or devices, but it will allow you to access the resources you need.