This used to be me, but I put a hook by the door where I handle my bag back up after I’ve unloaded it. I rarely go to the grocery on impulse though, so I’m always making a dedicated trip and leaving from my house, and the routine of it finally sank in. I highly recommend an extra large tote with stiff sides. I can typically fit an entire shopping trip in there for our family of 3 and just sling it over my shoulder