Coupons can be a useful money saver and now online services have introduced e-coupons, where saving money only requires swiping a card at checkout.
Sites like SmartSource allow you to search for the same coupons found in the paper, only here they're pre-sorted by brand. You simply print them at home.
But if that's too much work, other sites like Shortcuts and Cellfire let you crerate a shopping list and the site will find coupons for you, alert you, then automatically load those coupons onto your rewards card at dozens of chains.
With Cellfire you can even load the coupons onto your mobile phone.