Restaurants and stores WANT to know how your visit went, at least that's what their receipts say. Make a purchase as your normally would and check the bottom AND back of your receipts! Free stuff is free stuff, even if it takes 2.5 seconds of your time.
Here are some stores I personally shop at, that will give you discounts/free item's with a receipt survey.
Subway- A free cookie
Burger King- Free whopper or Original chicken sandwich with the purchase of ANY size fry & drink.
Dunkin Donuts- Free donut with the purchase of a medium or larger beverage
Buffalo Wild Wings- $5 off your next purchase!
Old Navy- 10% off your next purchase
Victoria secret- Coupon for $10 off with a minimum purchase (I've seen one's for 45, or 35)
Bath & Body works- Coupon for $10 off a $25-$35 purchase
Dressbarn- 20% off a single item.
Note: Read the small print! Most of these survey's have deadlines to enter, and deadlines to redeem the coupon codes. Don't miss out on free stuff by ignoring the details!
Know any other store's that offer this type of deal?