Set the screen to turn off after a short period of non-use (recommended: 15 seconds).
Set the screen to turn off after a short period of inactivity.
Reduce screen brightness (recommended: 30-50%).
Reduce screen brightness.
Turn off all wireless radios when not in use.
Turn off automatic syncing for Email, Calendar, Contacts, and other apps.
Minimize the use of apps that keep the device from sleeping, for example, music and video apps.
