In most cases, you need to be on their e-mail lists or in their reward programs
Panera Bread – free pastry
Starbucks – free drink or food item
Red Robin – free cheeseburger (the other perks for their rewards card are really good also)
Shop Rite – not free, but really amazing Raspberry Vanilla Cake
Adagio Teas – not free, but one of my birthday presents
Amazon Kindle – I love mine (although it wasn’t a birthday present, I do have a gift card to use for a book for it)