3 Tweak Location Services
On the topic of battery life and privacy, consider tweaking Location Services. While sharing your location with some apps, like Uber and Waze, is probably a good thing, leaving Location Services on for other apps is just unneeded.
To manage the feature, go to Settings > Privacy > Location Services. You have a couple of options here. For some apps, the best way to go is just to turn Location Services to Never. For others, you’ll have the option of sharing your location with the app while you’re using it or always. The best fit is up to you, so do a bit of thinking about which apps actually need your location.