Secure your Google account with 2 - Step Verification

What is 2-step verification?
Google has an additional security feature called 2-step verification which requires a user to enter a code when logging to a Google account.

This code is sent to a user on his  / her cell phone.

Controlling who sees you online on Facebook

Facebook has made a lot of changes by introducing its new Timeline feature.
It has also made changes in its chat application, so that users can control who can see them online.