You shouldn’t use email to send or receive sensitive data. If an email account is hacked or if the email is forwarded, that sensitive information could easily be exposed to someone other than the original, intended recipient. Instead, use a secure file transfer service.

Limit the amount of personal information you share through your social networking sites. Because it’s the kind of information most often asked for by security questions, and attackers can potentially use the information you post on your social media accounts to impersonate you or bypass some kinds of authentication procedures.