How To Download Complete Backup of Facebook Profile

Facebook has rolled out a new feature that allows you to backup all your data like your contacts,photos etc from your account.This backup will be downloaded in a single .zip file.The zip file will contain all your information in HTML(Browser friendly) format.This backup will contain the following
Your profile information (e.g., your contact information, interests, groups)
Wall posts and content that you and your friends have posted to your profile
Photos and videos that you have uploaded to your account
Your friend list
Notes you have created
Events to which you have RSVP’d
Your sent and received messages
Any comments that you and your friends have made on your Wall posts, photos, and other profile content