Hibernate or standby?

When the XP prompt gives you the options to Standby, Turn Off or Restart, holding down the Shift key gives you another option instead of Standby: Hibernate. Should you Standby or Hibernate? It depends on how long you will be away from your computer. Standby is good if you won’t be gone for hours. It conserves energy by running your computer on low power. Hibernate is better if you will be away for a while but do not want to wait for a total restart. It writes the contents of the memory onto a file. Now that you know, you have no excuse to keep your screen saver running.