The following settings are suggested, your needs will determine what is best for you:
Monitor/display sleep: Turn off after 15 minutes or less
Turn off hard drives/hard disk sleep: 15 minutes or less
System standby/sleep: After 30 minutes or less
3. Turn off your monitor, and other devices when not in use
Turning off your monitor and peripherals will save energy
Plug gadgets into power strips and keep them off when not in use
Automated power strips are available from the Campus Computer Store, that will detect when your desktop computer is off or asleep, and automatically power off connected peripherals
Although turning off your computer may be less convenient, the longer re-start provides a more reliable experience and will save slightly more power than using standby mode
4. Extend the life of current Equipment
Delay buying new computing equipment until you need it