It's an old-fashioned tip that works: Turn off the lights when you leave a room to save money and electricity. But it's an easy thing to forget, especially for young kids in the house. One idea to get kids' attention is to invest in colorful switch plates that come in vibrant colors like green, purple, pink and blue. They help remind them to turn off the lights when leaving a room. And if you can, invest in dimmer switches for light fixtures that are usually on. Lowering the light level means less energy is used, and the life span of the light bulbs will be longer, too.