Wattson DIY Kyoto

Wattson DIY Kyoto

We get nagged daily to save electricity, but the problem is it's invisible. Make energy visible, though, with a gadget like this handsome real-time electricity meter - it glows blue at normal electricity consumption and flashes red when you're splurging - and you'll have a daily reminder. It was the first such 'display device' that made my wife change her energy habits at home.