I just got this phone, has the battery life always been this bad?? This is going to make me go back to the iPhone.
The normal should be easily 8-10 hrs.. There are some key tips to good battery management.
Social media/email try and limit the amount or how frequently it polls for updates
Display, turn off auto brightness. This is a big killer because its constantly adjusting your screen brightness.. Most run at around 25% indoors and a little higher in bright light like outside.
4g... Don't turn it on from Settings unless you really need it.. Again.. Radio cycling on and off from 3g/4g is a big killer.... Plus 4g if you do get the signal is a huge battery killer..
Custom Widgets on your home screen.. Yes they are nice but again, they normally are hitting the net to update the content on them so its hitting the battery hard.
Those are some of the most common areas to look at for improving battery.
Also like anything new, your update to ICS will take a few hours maybe a day to settle in. A few shut down's and reboots usually help.. Worst case situation some end up doing a factory reset but I wouldn't go that far just yet.
unplugged with full charge at 6:15. very little usage since, it's 9:30 now and i'm at 67% battery power.
Android OS is at 53%, much higher than my screen at 29%. Seems odd, usually the screen was the one consuming the most out of my battery?
Check to see what you have running possibly in the background.. Some apps or something that might be munching battery.