I had bad battery life in the beginning and noticed some things were draining the battery. After turning these off, I am getting AMAZING battery:
1. Location Services for Facebook (this kills my battery since I open FB quite often)
(and location services in general for anything you don't need)
2. Emergency notifications (not sure if this had any effect but I turned it off)
3. turned off any tracking on verizon's part, and the targeted ads (again not sure if this had any effect on battery life). The targeted ads was not only through settings, but you go to some webpage on your phone and there is another setting. I forgot where, but I saw it on this forum. It was really sneaky.
4. Turn your emails to "fetch". I noticed a great improvement switching all 5 email accounts from push to fetch @ 15 min. The longer the interval the better.
5. Calibrate your battery if you haven't. I calibrated out of the box. Didn't charge after first power on, and drained to 1%. Then I turned the phone off and charged overnight. Next day I drained down to 1% and plugged in (without turning off) and charged to 100%. Also try a slow drain (don't run a lot of stuff to drain battery). I dunno why, but on my MBP and iPhone, this seems to result in better battery life or more accurate readings.
At this point, I can charge as often as I like (when driving, middle of day) and not worry about where I am in the charge cycle and I still get great life without calibrating.
My latest readings have been 1 day 12 hours+ standby and 8.5 hrs + usage.