A discount is another way to grow a business with Facebook. According to the same survey by Exact Target, 40% of customers like a page to receive a discount.
Here are a couple of approaches when giving away discounts:
a. Like a page to get discount
The simplest would be asking someone to like a page in order to get a hidden discount code that they can use when they pay at your local store or pay when they checkout from an online store.
b. Like a product for discount
This one is slightly different, unlike earlier, it requires someone to like a product to receive a discount.