Sustainability consultants can help you make a plan, or you can use free services.
The Energy Savings Trust's Home Energy Check is a free service that only takes 10 minutes, and will help you assess your home's energy performance, with suggestions for improvements.
Check out the government's energy grants to see if you're eligible for help with your energy bills or making your home more energy efficient.
You can talk to a Green Deal assessor or provide to help you identify what energy-saving improvements you could make to your home. There's also the Energy Savings Advice Service in England or Wales, or the Home Energy Scotland in Scotland.
Compare tariffs with your energy supplier to check you're on the most economical for you, or look into changing suppliers for a better deal.