Restaurant.com offers discounted restaurant gift certificates. Typically, $25 gift certificates sell for $10, for a $15 savings.
But, from time to time, you can save even more. And this is one of those times.
Use the code DEAL and you'll get $10 certificates for $2.80 and $25 certificates for $7.
You can search for restaurants on the site by type of food, location, etc.
I have used these certificates several times and have never had a problem with them being accepted. Make sure you do read the fine print, though, as some deals require a minimum purchase or aren't good on certain days.