[chronster]

Make sure you let the device auto adjust the brightness. When you're somewhere like school or work or the movies and you have no service or need no service, set the phone to airplane mode. I don't think programs running in the background take up too much battery, but it's still a good idea to close anything you're not using.

Also, people have said the "slow trickle" charge via usb on your computer seems to keep the battery charged longer. Try hooking it up to your computer overnight (your computer might not need to be turned on to charge the phone, I know mine doesn't.)