10 Tips to help preserve iPhone battery life

1. Turn down the screen brightness.
2. Adjust your poll time to check for email less frequently.
3. Turn off the WiFi.
4. Turn on Auto-Lock for the screen.
5. Turn off the Equalizer.
6. Pack more juice.
7. Take advantage of the commute time.
8. Kill the vibrate.
9. Turn off Bluetooth.
10. Update the iPhone often.
    
    via The iPhone Press