If you ever forget to turn off your Mac, or use it in the morning right before you go to work or school, consider setting a timer. You will both save energy and time. I think this would be pretty useful to have your Mac turn on as you get out of the shower, and then have it turn off shortly after you leave. Just click the look under the Energy Saver settings of your System Preferences. Click the button at the bottom right corner of the window that says Schedule.
