Amex: Amex Offers has a Quiktrip in store (order via QT app) off $5 offer, can be used twice. And the Amex offer appears only available via the Amex app too. So basically you should install the Amex app, check if there are offers, add them if yes. Then install the QT app. The food items in QT actually are the best in gas stations (they actually have a kitchen Tried today: the philly cheese stake and chicken flat bread. Total $7 (tax included, minus $5 makes it $2). Plus a large drink which is about $1.50 separately.
Chase Pay order ahead $5 off (first use): similar to the QT app, except in the case of Chase, they have a lot more restaurants, subway seems is the most popular (most stores), but I tried chick fil a, which I have not eaten for a while. You will also need to install Chase Pay app. Note I includes the links to iTunes app store here.
Last but not least, the Panera is offering $10 bonus card if one purchases $50 gift/egift card. I already got one, and plan to get another one (I am not too greedy since sometimes it takes time and effort to track down e-gift cards).