Uninstall any apps that you don't use
Clear the cache on your device to free up cache memory
Use a phone case or skin to protect it from scratches and other damage
Turn off features like Bluetooth, GPS, Wi-Fi, and NFC when not in use to save battery life
Keep your screen brightness at a reasonable level so as not to drain your battery unnecessarily
Manually close any unused applications running in the background of your device using an app such as Task Manager for Android devices or Force Quit for iOS devices