-I dont use any widgets
-My phone is on GSM only (im on AT&T)
-I turn off wifi when im not using the phone
- I turn down the brightness a little (which btw is good for me since it makes it harder to see the dead pixels)

I should clarify a little also, by "the whole day", I mean from 8am until around 6 pm, I just charged the phone when i got home.