How to get the fullest of my iPhone 5 battery?

I'm going to a concert tomorrow night and I don't want my phone to die, Is there anything I can do to make sure it won't die out?

Turn the brightness down and close all the apps you have open (double click on the home button, hold down on one of the icons that appears in the row at the bottom of the screen, hit the little red minus for all of them)

Well first the obvious. Charge it before you go out. Now the not so obvious. Keep screen brightness down, keep Bluetooth and Wi-Fi off, close apps that are running in the background, and for extreme cases if you are really trying to conserve a little battery in case of a emergency, turn airplane mode on, data will be shut off on your device but it will extend your battery significantly.

Let your phone completely die out tonight… Let it shut off…

charge it until it says its full… And then pull it off the charger…

its keeps your phone in use longer not just for tomorrow but for every time you charge your phone you should do that. Your batteries life span will last much longer.

also turn off bluetooth, Wi-Fi, use limited data, turn the brightness down on your phone, turn off your battery percentage off (if you have it on) and close your apps

when i'm in situations like that…

i just limit my use to my phone and even put it on silent (vibrate off too)

Iphone battery tips:
http://www.gatorspit.com/tips/iphone-battery-save.html