Hispanolistic via Getty Images From leaving the lights on in the lounge to spending a little too long in the shower, the small choices we make can have a big impact on our energy bills. A whopping 36% of us also report using more energy in the winter months, according to The Energy Savings Trust. So as we continue spending more hours than ever in our homes, there’s never been a better time to reassess and work out where you can save energy – and that all-important cash. Here’s our room by room guide to how to look after the pennies.