Do-It-Yourself Home Energy Audit
First, just walk by your house. Through a simple walk-through and a bit of effort, you could spot several problems in any type of house. Although conducting an energy audit of your home, make remember of the areas you have inspected and the problems you have found. This will help you prioritise the measures you required to take to improve the energy efficiency of your home.
There are four main problem areas which are responsible for energy losses: Air leaks, building insulation, heating/cooling equipment and lighting.