This deal has ended.
Through 6/13, use code DAD at Restaurant.com to take 70% off dining certificates. This means that $10 gift certificates which normally sell for $4 are now just $1.20 and $25 gift certificates, normally $10, are now just $3. As an added bonus, the code will also get you a free $10 Restaurant.com certificate. Not all restaurants participate, but there is a good selection to choose from. Just be sure to read the fine print, as many places exclude alcoholic beverages, weekends and other things.