To ensure that you can always recover your Gmail account, create an alternate email address with a service like Gmail or Outlook. Then, when you can’t get into your Gmail account, Gmail can send you the link to reset your password.
Gmail Tips: How to Create Multiple Email Addresses in One Gmail Account
To add a secondary email address to your Gmail account for password recovery:
Go to your Google Account page and select Security from the left pane.
Scroll down to Ways we can verify it's you and select Recovery Email Address.