Screen brightness is a factor. Fb, Spotify, Netflix and many more like eating battery's. Also look at WiFi... if there is no signal the phone will keep looking, turn it off. NFC if not using then turn it off. Bluetooth if you are not using it, then that can go. I'm sure there is many more but above just highlights a quick fix.
Thanks mate, although I have greenify installed which limits background usage of applications. Battery is working fine currently, I was concerned about the battery capacity showing 3200 mah, as opposed to the advertise 3700 mah.