Check out some local spots that offer Restaurants.com discounts in a post on the Brent the Brewer blog.
I have had some luck buying discount coupons from Restaurants.com, although I agree with Brent that you need to watch the fine print to see when you can use the coupons and what you can buy. The first rule is that you should never get less than 80% of the coupon. The site offers discounts all the time. Just sign up for email.
Anyone else have a favorite place offering Restaurant.com deals? Brent lists three, but the stable of restaurants has been growing.