To celebrate 'Start Your Family Tree Week' from the 26th of December to the 1st of January, the website Find My Past is offering users 50 pay as you go credits, absolutely free! This is a great opportunity to view some census records or newspaper articles at no extra charge.
All you have to do is go here and click where it says "claim your credits now." Then just enter the code
and the free credits will be yours.
Just make sure you do it quickly, because the code will expire on the 2nd of January 2013. Also, the credits will expire after 90 days, so use them up. (I'm sure you will)