I currently have a server that I use as a file server/web server/print server/skype server. The server is "headless" meaning that it does not have a keyboard, monitor, or mouse connected to it. I have it connected to the network and sitting on the floor in my office. For awhile the server stayed on 24 hours a day. I didn't need it powered up while I was a sleep, so I came up with this simple shutdown and power up solution.
Materials:
"Heavy Duty" Outlet Timer
similar to this
Set the computer to power up when power is lost. You can do this by entering the computers BIOS setup and looking for Power Management settings. On most computer you will see "Restore on AC/Power Loss". Enabling this will allow the computer to power up once house hold power is established. An example would be: Your power goes out for a moment...when the power comes back on, your computer will automatically power up. You want to "Enable" this feature, then Save & Exit the BIOS. Once saved, go ahead and power down your system.
A better solution would be to wire up a relay of some sort to the power button itself.
Good instructible overall though.
Also, is there a Sleep on LAN function? Can you shutdown the computer with WOL?