The Lights

Everyone needs light to see by. Although, if it's daytime, I would suggest opening the blinds and letting some sunlight in. At night time though, or if the sunlight isn't enough to see by, don't forget to turn them off!

Some say that it wastes energy to turn bulbs on and off. I found an article that sums it all up. In actuality, it depends on what kind of bulb you are using.

Incandescent Bulbs: You are actually saving by turning these bulbs off, if even for a minute. In addition, 90% of all energy that these bulbs put out is heat, so you save A/C energy too.

Compact Fluorescents: Turn off the light if you're leaving the room for more than 5 minutes. Less than that and the wear and tear on the bulb is costing you more than you're saving though, so think ahead about how long you will be gone.

LED lights: There's no wear and tear on these babies from switching them on or off, so turn them off even if you're leaving for a few seconds. Every little bit helps!

Here's a link to the article if you're interested: Turn off lights