Don’t share your password and other sensitive information even if it’s Google asking for it.
Make sure your computer has a firewall and that it’s on.
Make sure you have a reputable antivirus. Window’s Antivirus has become really good. Try adding Malwarebytes.
Encrypt your Hard Drive, Mobile Phone and any other data storage. All modern OS have an encryption feature.
Back up your data. They say no matter what you do, you can never have bullet proof security. Backing up your data will prevent misfortunes such as ransomware and others.
Avoid oversharing!
Avoid using free Wi-Fi because attackers can easily make those to steal your data or even tap into them. If you have to, use a VPN or tunneling.
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