What do you do if you find yourself in the situation of needing a bag for items but don't have a reusable one with you? Carry things out in your hands? In a cart? Accept a disposable one? If you find yourself in this position often, what system could you put in place to try to create a successful habit of not using plastic bags?
A lot of the time when I don't have one of the reusable bags I try to get paper bags if they are available. If a paper bag is not available then I would most likely carry it out in the cart. A good system so that I always have a reusable bag is to always leave one or two in the car so if I forget the bags I have backups.