Why not turn down your water heater when you go on holiday? Most water heaters have a vacation mode to let it know you won't need hot water for a while. It saves gas and money and it's good for the environment.
Are you on a capped plan for your mobile phone? Do you never seem to reach the free call limit? Stop calling long distance on your home phone landline. Pick up your mobile instead and keep using your free calls.
Do you know that just by leaving electricity items on standby, you could be adding up to 10% to your electricity bill? What can you turn off overnight?
Let's face it; in Australia we have pretty warm weather. Even during our winter in most cities, English people would gladly swap our weather with theirs. So why do we have so many clothes dryers in our laundries? Now, I'm not going to tell you to stop using yours (even though this will save money). I'm suggesting you sell it. Get it out of your life. Now you have no choice but to put your clothes on the line. The temptation is 100% gone. Plus you will probably become more organised with your washing schedule. But for those people who do live in a cold place (e.g. Tasmania) an indoor handy line will help people who live in cold, wet weather climates. Keep it in your laundry and hang your clothes on this. Your bank balance will thank you.