Step 2: Leave them somewhere you will remember them
This is a key step. Shopping is something we've all done so much of that it's sometimes hard to remember to bring something like the reusable bags with us. Put them someplace you'll remember them, whether it be next to the door, where you keep your keys, next to your shopping list, in the car, or next to the bike. Multiple stashes can be helpful for the especially forgetful.