Install a high performance shower head. You can save at least 88 dollars a year by doing this.
Seal any leaks you may have. Electrical outlets are said to be a big culrpit. Along those sames lines, energy experts recommend swapping out your old light bulbs for more energy efficient ones.
By upgrading your air conditioning system you can save almost 200 dollars a year according to energy experts.
Also, by closing and opening your blinds you can have more control over how hot your living area gets. You can keep your system from having to work harder.