greener i.t.

Here are some very simple tips for cutting technology related power consumption:

LCD's (flat screens) use 66% less power than CRT's (tube screens)
Notebook computers use up to 70% less power than desktops
Cut power to pc's overnight when not in use, or have pc's go into "hibernate" mode
Unplug unused chargers and dvd players, etc. when not in use

For Datacenters:
Maintain equipment in temperature and humidity tolerances recommended by manufacturer
Use server virtualization to cut the number of servers you need / run thereby decreasing energy
Turn off all unused / key equipment (e.g. you have a test server, you only use it when testing once or twice a year)