This is an easy one. Do you leave any room lights on in your house to help you (or your little ones) navigate at night? Switch them off and use low-energy night lights instead.
**How this helps**
Super-efficient night lights, particularly ones that use LEDs, need so little energy that they cost less than a dollar *per year* to operate. And LEDs virtually never burn out.
* Replace your incandescent light bulbs with CFLs.
* Use solar-powered outdoor lighting.