I never cared to bring my own grocery bag. Was that truly the environmentally friendly option given how much more energy is needed to make a reusable bag? That and they made great bags for cat poop. Until I was charged 10 cents a bag. I've brought a bag ever since. No one had to change my mind, a small incentive changed my behavior. An incentive so small that in a lifetime it couldn't make a meaningful financial difference. But it worked. What small incentive could you add to get more of a behavior you want in your space?