Heating your house and saving energy

My energy bills are really low, I average £20 per month for gas and electricity. I have gas central heating and an electric oven. I wanted to share how my bills are low and suggest that many of these are within reach of a normal person in a normal house.

1. I don't run my heating to keep my house at 24 degrees. My thermostat is set to 20. I will wear a jumper before switching the heating on (although I am quite warm as a person). It might sound undesirable but honestly, it will save you a packet.
2. Make sure you have thermostatic radiator valves, the ones that are quite large and usually have red or green coloured numbers on them. They are no use if turned all the way up in every room but for instance, keep a spare room at 2, perhaps the bathroom at 4 and most rooms at 3. Why pay to heat a room you hardly use? Also, you might very well not want the bedroom at too high a temperature which will cook you when you are under the duvet.
3. Make sure you have a room thermostat that will switch off your heating when you house is warm. You might think that having loads of thermostatic radiator valves will do the job but if the boiler is still running when all the rooms are warm, you are quite simply paying to heat nothing. Honestly, this can save loads.
4. Make sure you seal any drafts around windows etc. They don't always make your house very cold but they can make it feel cold which makes you turn the heating on. Use curtains and draft excluders if required.
5. Make sure you have good loft insulation. It might seem expensive but it quickly pays back. The recommended amount is now about 250mm (almost a foot!) which can be annoying if you have a boarded loft but do what you can and make sure it looks cosy like a jumper!
6. If you have any cold rooms (or if you are like me) fix some rigid insulation to the inside of the outside walls and then plasterboard it and skim it. This works well on cavity or solid walls and can reduce some drafts as well as heat loss. It doesn't cost a massive amount and can be cheaper than cavity wall insulation (as well as not bridging the cavity and causing damp.