TVs such as the Samsung UE46C6505 have sensors that adjust the screen's backlighting depending on the light level in the room, cutting power use by 30%-50%.
Up to half of the heat in your home disappears through the roof and walls. Installing 250mm of insulation in your loft is a relatively simple job, could cost as little as £250 and can cut your bills by £100 a year. Visit the Which? guide to buying loft insulation.
Best Buy bulbs
At £4.99, Philips Tornado Turbo Energy Saver 20W is the cheapest energy saving bulb, according to Which?. It gets started quickly, and comes in bayonet and screw fittings.
You could save hundreds of pounds on your energy bills by switching your supplier. Compare deals on price comparison sites like Confused.com, moneysupermarket.com and Which? Switch.
Want to save on heating but not sure where to start? Carry out a free home energy check on the Energy Saving Trust website. Its online tool claims it can save you as much as £250 a year.
If you're looking for a new gas combi boiler at a great price, you might want to consider the Potterton Gold C24HE. A Which? Best Buy Boiler at only £800 – a saving of £150 on a similar-performing Best Buy.
Energy monitors show you how much electricity you use in real time. They can help you cut energy wastage and save you money. The cheapest Which? Best Buy is the Efergy Elite (£35).
Reduce your bills by paying by direct debit, managing them online and getting a 'dual fuel tariff' (where your gas and electricity come from the same supplier). Sending your supplier accurate meter readings can also cut your bills.
You should get your boiler serviced regularly. The latest Which? survey of servicing contracts found that Worcester Bosch was best. But contracts can be dear. You may be better off paying for one-off repairs.
Don't leave your electricals on standby. If you turn off DVD players, set-top boxes and computers, you could save up to £40 a year.