More ideas
1. Avoid using self service checkouts in supermarkets. They will give you change in very small units (i.e. copper and 5p coins).2. Avoid using self service checkouts in supermarkets. They will nag you continuously and accuse you of putting an 'unidentified item in the bagging area' which will of course be your bag.
3. Avoid using self service checkouts in supermarkets. They are designed to cut staffing.