With all of the online data breaches these days, it's more important than ever that you take measures to protect your online accounts. A powerful way to do that is to enable two-factor authentication (2FA) on any sites that support it. Here is a link to a Lifehacker article with a list of sites that provide 2FA:
http://lifehacker.com/5938565/heres-everywhere-you-should-enable-two-factor-authentication-right-now
