Turn off GPS, Bluetooth, NFC, Wi-Fi and mobile data whenever you don't need them. Turning off location data, or setting it to use Wi-Fi or 3G data rather than GPS works perfectly well. Only turn on Bluetooth and NFC as long as you need them, and there's no need to have both Wi-Fi and mobile data turned on at all times. If you use Wi-Fi a lot though, say at home and at work, then it makes sense to keep set your Wi-Fi to ''Always on during sleep'' as this uses less power than to have your Wi-Fi reconnecting every time you wake your phone