How to have back up of all your GMAIL account

We all use gmail and many other feature we get with our Gmail account like Google+,picasa,ADsense,Web developers tools and many more.
Suppose someone hack into your gmail account.You will loose access to all of your confidential data like contacts, images, messagesetc.Using this trick you can backup data from all or any specific (like picasa only)  Google services.

Follow steps below to have a backup of your gmail account.

• Login to your Google (Gmail) Account
• Click on the Account (Your Profile Picture) and then Account Setting.

Select Data Liberation from your Left window Pane.

If you want to download all your data click on DOWNLOAD YOUR DATA.

You can also download data of individual service of your choice.

This trick can also be very helpful if you want to access your data (contacts, messages, images ) while you are offline

ALSO make a backup of your facebook account 
FACEBOOK BACKUP