How to improve the battery life of iPhone 4S?

Since I have installed iOS 6 my battery life seems to have deteriorated, and I'm having to fully charge my iPhone 4S every day. Can anyone give me any recommendations of settings I can change to improve my battery life?

I have been having the same problem! People told me to turn my brightness down and so far it has only helped a little. Kinda wish I didn't update.

Switch off the 3g settings off when not in use (as well as Wi-Fi), and if you don't use them keep location services off; keep the Brightness settings down low enough so it doesn't drain power, but not so low you can't see (I don't recommend using auto-brightness).

Doing the above seems to work for me, I can have it going for 2 days, 2 and a half if I don't receive many texts or calls.

You can improve your eye on these iphone batteries for mobile operator you have a good go. He may as well tell you how to improve your battery. Solved your problem.