Lower screen brightness
Use auto-brightness
Shorten screen timeout
Turn on battery saver mode
Close unused apps
Disable Bluetooth when not needed
Disable Wi-Fi when not needed
Disable mobile data when not needed
Turn off location services when not needed
Reduce push notifications
Use dark mode
Turn off background app refresh
Limit widgets and live wallpapers
Keep apps and system updated
Avoid extreme temperatures
Use airplane mode in low-signal areas
Reduce screen resolution if possible
Turn off vibration and haptic feedback
Unplug accessories when not in use
Charge before battery drops too low