There are a lot of ways to get more battery time out of your iPhone. Turn off Airdrop, Bluetooth, Location services, Background App Refresh, so on and so on. While they do work, they don’t make a significant difference.
The single most thing that will make a dramatic impact to your iPhone’s battery life i’ve found …… is the brightness setting.
With it set at the lower 1/3rd end of the brightness bar in a brightly lit room, I can end a 16 hour day on around 44% battery life with my iPhone 5 (iOS 7). That’s with Bluetooth on, Wifi on, all of the Location using services i want activated, Background App Refresh on, and using my phone normally throughout the day.
Make sure you turn Auto-Brightness off otherwise your brightness settings will revert to the way they were before throughout the day.
Give it a try and I hope it works for you too.