Living Social is another "deal" vendor like Groupon. Sign up using this link and you may get a $5 credit (it is random from what I can tell). Take advantage of a deal,, invite friends to take advantage of same deal and get your deal for free if 3 friends buy in.
Today's deal (under many cities, but Buffalo for sure) is a $20 Amazon Gift Card for $10!!!!! This is a great deal anyway you look at it. It takes about 24 hrs to get your deal back after purchase (same as Groupon)
CLICK HERE to check them out and score a great deal!