You should enable “2-Step Verification” for logins to your Google account.
Google Authenticator is an app that runs on your iOS or Android phone and gives out 6 digit codes that must be entered when you log in on a device. This can’t really prevent phishing (because a phishing page will just ask you for a code from it and if you’re fooled, you’ll give it up) but it does prevent attacks if a bad guy has only your password. Authenticator is free and simple to use, and is supported by many sites, including GitHub. Microsoft offers a nearly identical Authenticator app too. How ToTP works.
YubiKeys (and similar) are small USB keys that you can configure your accounts to require. They are cheapish (~$18) and cannot be phished (even if you tap your key while on a phishing site, the attacker cannot use it due to how the crypto works). These are the best protection for your accounts (Googlers all use them) and are highly recommended for Chrome extension developers, journalists, activists, etc, etc.
Consider, for instance, this phishing email that this Chrome Extension developer received:
If the developer’s account were protected by a Yubikey, his credentials would be useless to a phisher because they would not have the required second factor necessary to log in and plant their malicious code in the developer’s extensions.
If the developer’s account were protected by a TOTP/Google Authenticator, it would require that the attacker collect the token value and be actively watching for victims such that the ephemeral token did not expire before they had a chance to replay it to the legitimate Google servers.