Doormat changes message if you're entering or leaving
This clever doormat either says 'come in' or 'go away' depending on which direction it's facing. So when people walk in they're greeted with 'come in' and when they walk out they're asked to 'go away.' Or you could just paint over the whole thing with 'leave money' like I did. It's been three months and I've already got 35 cents. I never have to work again!