Use a strong password that uses a combination of upper and lowercase characters, numbers and symbols. It should be different to passwords you use elsewhere.
Make sure your email account is secure. Use a strong password that you don't use anywhere else, review your security settings and enable two-factor authentication.
Review your Approved Devices regularly. You will need to enter a six-digit confirmation code (sent to your email address) when logging in from a new device.
Never share your password with anyone, even with us.