Peter Drucker said: “If you can’t measure it, you can’t manage it.” But it’s a bit boring watching your electricity meter slowly turning. So why not install a digital electricity usage meter that displays to the nearest watt how much energy your firm is consuming? Meters aren’t expensive. You can pick up a Current Cost Envi digital display (made by British entrepreneur Martin Dix) for under £40 on eBay. Installation is non-technical and takes 30 seconds. If you input your price per kilowatt hour, it will translate the energy statistics into pound signs. The display is wireless, so you can keep it on your desk. You’ll be surprised what an impact the installation of such a device will have on consumption.