Draft Excluders....
When you heat rooms in your home, heat will attempt to move from warm areas to cold areas until both areas are the same temperature. In order to lose less heat, you can use draft excluders in front of your doors to keep the heat in, saving energy and money.
Here's a video of how to make a draft excluder from old clothes to help keep your rooms warm for longer.
Draft-proofing windows and doors could save an average of £50 per year and preventing over 147kg of CO2 from entering the atmosphere.