Don't do the restaurants.com gift cert. I got those separately when the ran a promotion to get $100 in gift certificated for 1,000 miles.
They come in $25 denominations, you must spend a minimum of $35 at the restaurant, and they all had so many restrictions that they are pretty much useless. Thinks like Sunday-Thursday night only, no alcohol, must purchase two main courses and an appetizer, and one restaurant refused to even accept it.