When I originally got the phone, I went through the process of disabling all the apps that the phone would allow me to. I didn't feel that it helped me THAT much, so when I had to hard reset my phone recently, I decided to just leave them alone. I would consider myself a power user and have been pretty happy with the battery-life. I noticed that the battery that the phone came with doesn't quite last as long as the battery I received as part of LG's battery/SD card promotion. When I use my phone consistently, I can get between 3.5 - 5 HRS of SOT. If I don't use my phone too much (which is really rare), by the end of the day, I tend to be at around 10-15% battery life remaining, but my SOT is at around 2.5 - 3 HRS.
Keep in mind, one of the reasons I chose this phone over all current competitors is because it still offers a removable battery. That was probably the biggest selling point for me. I love being able to run my phone as long as I want, let it go straight to zero, then swap out my battery and charge the dead one. By the time the next one dies, I have a fresh one waiting in the wings.
Now, I am fortunate to work in an office where I can just leave my spare charging at any given moment, I realize that is not the case for most.