One program I highly recommend is MyPoints.com.
This is how it works: You sign up, and they email you advertisements. You get
points for reading the ads, and then you can redeem your points for gift
certificates to different merchants such as Blockbuster, JC Penny's,
Barnes & Noble, and many other well known stores. So far I've redeemed my
points for a $25 certificate to Blockbuster, and a $50 certificate to Home
Depot. Not bad for just reading email.
Free Links Links to sites with Free stuff
Other Frugal Sites Links to Other Frugal Sites