Tips on how to keep your iPhone battery healthy?

I got sprint contract for 2 years, I have insurance for 2 years and then I can sell it back and get the iPhone 7 or sumthing but how can I keep the battery healthy and it will last the while day like it does now. Tips please: D

Added (1). Its iPhone 5

Don't plug in your phone unless it has 30% battery or less, keep the lighting dim, and don't play games for a long period of time because it runs your battery. Hope I helped a little

When you're not using Wi-Fi turn airport/Wi-Fi off
Lower screen brightness
Lower volume or use headphones
Demanding apps like Infinity Blade 1/2 can run down your battery
Thats all i can think of

I've been waiting for this question! Umm try to not overcharge your iPhone. Charge it for at least 2-3 hours and that will do!

Don't leave your phone charging over night that will put excessive heat on the battery and reduce the lifespan of it

- Double Tap the home button and long press on the apps that appear until they start to wiggle, then press the red X that appears to close those apps

Turn off Auto Brightness
- Go to Settings
- Go to Brightness
- Turn off

Reduce Screen Brightness
- Go to Settings
- Go to Brightness
- Drag down to where you can see it comfortably (about ¼ of the way is a great starting point; your eyes will adjust to it as well)

Turn off BluTooth
- Go to Settings
- Go to General
- Go to Blutooth
- Turn off

Turn off Wi-Fi (When not near a Wi-Fi Area)
- Go to Settings
- Go to Wi-Fi
- Turn off

Turn off Location Services
-Go to Settings
- Go to General
- Go to Location Services
- Turn off

Turn off Push Email
- Go to Settings
- Go to Contacts, Calendar & Email
- Go to Fetch New Data
- Turn Push Off

Fetch Less Often
- Go to Settings
- Go to Contacts, Calendar & Email
Go to Fetch New Data
- Go to either Hourly or Manually