Restaurant.com usually sells $25 restaurant gift certificates at a discounted price of $10 to $15. But right now, they're having a 90% off sale, which means you may be able to get a $25 gift certificate for just $1. You'll need to enter the promotion code JOY at checkout.
Make sure you read the fine print with each offer, as some exclude certain nights for dining or make you purchase a minimum, but this can be a great deal.
It's such a big deal that the site was running slowly on Tuesday, so you may need to try your purchase during off-hours. This offer ends Dec. 24, 2011, which makes it great if you forgot someone you should've shopped for!