[notatoad]

Wal-mart's big innovation in self-checkout that i'd love to see other stores adopt is the corral. Every other store seems to just let people line up in a free-for-all and the line gets long and starts to merge in with other lines and nobody's quite sure what they're lining up for. Then some narcissist thinks that despite the obvious crowd waiting to check out, they can start a "second line" that they'll be at the front of. And the stores see this crowd as a sales opportunity, so they randomly scatter product displays in the middle of where the line usually forms.

Wal-Mart has a nice cordoned-off maze to keep the line under control - a simple solution that works perfectly.