Install the Checkmate Chrome extension to be notified of savings opportunities.
Shop as usual. Once you reach the checkout, Checkmate searches the internet and finds the gift card that will save you the most money in a few quick seconds.
At checkout, Checkmate will notify you of potential savings. Using the Checkmate plugin you will prompted to set up a Checkmate Wallet where you can purchase the discounted gift card. When you click 'Buy and Apply' a gift card will be purchased and will be applied to your checkout. You are charged the discounted gift card value. If you decide not to use the gift card it will be stored in your Checkmate Wallet.
Once you set up your Checkmate Wallet you can store any existing gift cards in your wallet. The Checkmate extension will notify you when shopping on that merchant's website so you don't forget about using any existing gift cards.