There are many retailers that offer another gift card for a certain amount when you purchase holiday gift cards. One example is Hornbachers deal which is valid thru today.
There are many restaurants that offer this kind of deal also. Even if you are not giving the gift cards as gifts but frequent the establishments regularly you could purchase the gift cards and get the extra card as an extra incentive.
This is part of a 90 day Holiday Countdown, previous posts can be found here
