Here are the Boston-area coupon sites that I subscribe-to via email. I probably buy at least one discounted ($25 for a $50 gift cert, etc.) meal each week:
Yelp http://www.yelp.com/deals/boston
OpenTable http://spotlight.opentable.com/deal/boston
Yipit http://yipit.com/
AllMealDeals http://www.allmealdeals.com/blog/
Tippr http://tippr.com/
BuyWithMe http://www.buywithme.com/
LivingSocial http://livingsocial.com/
Groupon http://www.groupon.com/subscriptions/new?division_p=boston
Eversave http://www.eversave.com/boston;jsessionid=3A4AA98C47D988898B244E046D61CD56.app16
WowWhatSavings http://www.wowwhatsavings.com/
Perks http://shopping.netsuite.com/s.nl/c.667537/n.2/sc.35/category.1376/.f?partner=P00005
CBSBoston.com http://offers.cbslocal.com/boston
Restaurant.com http://www.restaurant.com/
Boston’s Big Deals http://gmb.mediawebconnect.com/
Weforia http://www.weforia.com/deal/boston
Bloomspot http://www.bloomspot.com/
Note 1: For Restaurant.com, the "regular" price for a $25 gift cert is $10, but there are always coupon codes available (Google is your friend) to get 60-80% off that $10 price, bringing it to $2-$4 for a $25 GC.
Note 2: Some of these sites merely accumulate all of the deals together, so there are some repeats/overlap.



