As follow up to the computer shut-off tip post, details HERE and HERE provide two resources that outline when computer shut off is saving more energy. A co-worker of mine asked whether the powering up of the computer use more power than keeping it on sleep. If your computer will be unused for more than 2 hours, you will generally save energy by shutting it off for a desktop computer. So after a day at the office, it seems to make sense to power down rather than go to sleep mode.
Short. Sweet. More to come shortly!