http://windows.microsoft.com/en-US/windows7/help/upgrading-from-windows-xp-to-windows-7
Spread some holiday cheer, to someone.

For this year’s holidays, you can use Gmail to send one real postcards (snail mail) in the US only, for free!
To send a card, visit gmail.com/holidaycard. You’ll be able to send one card. You can enter a message of up to 255 characters long along with the recipient’s name and address, and then you can select on of the six postcard designs.
The best things in life often actually are free. Here, a list of 173 of the best things in life—free software, for launching apps, networking, backup, synchronization, entertainment, and more.
Every computer needs protection. But what if you’ve got no money for security software? Don’t worry–there’s power security software and services that can keep you safe, for free.