Keep an updated mobile phone number and a secondary, non-Gmail email address attached to your account.
When you see offers like these, run away: Gmail Password Hacking Software 100 Working Free Download
Some sites offer a "download" that's just an HTML page mimicking a Gmail login. When you enter credentials, they're sent to scammers. You think the software is "not working" when actually you've just handed over your own passwords. Keep an updated mobile phone number and a