I recently came across the Honey add-on/app which will search out deal codes or coupons any time you make an online purchase to try and save you money. Looking through the site its legit and most of the reviews I read have good things to say. Some people have said its best to manually search the code list it gives you as it doesn't always give you the best code when it auto fills. Other than that though its an easy way to save some money with online purchases. I checked a couple local businesses already and it pulled up a groupon deal I wouldn't have known about. So far so good.
Here's a link and referral code if you feel like passing a few bucks my way when you sign up!
joinhoney.com/ref/nkzx8p