Go to Restaurant.com and use promotion code CHOW to receive your 80% off. This promotion ends 4/6. If you sign up with Restaurant.com you will receive e-mails with discount codes. Your gift certificate will come to you as an e-mail gift certificate. Print it out, bring it to the restaurant, and present it prior to ordering. Make sure you read all the fine print. There is a minimum purchase of $35 to use your $25 certificate, which is easy to do.
I have used them twice now and have had no problems using them. We plan on using another one this weekend.
Saturday we (my family of 4) went to RF McDougall's for dinner. The original cost was 56.57 and we paid 31.57 (plus the $2 for the gift certificate). The bill should have been $24.82 but my husband wanted to splurge and buy a couple of beers. Going through the drive through at McDonalds it would have been an easy $20 for us; I would rather spend about $25 to eat out and have a nice meal.