something you may want to get if you don't already have one is advanced task killer. i set mine to kill tasks that run in the background every so often. helps prevent them from eating battery life. prevent the amount of apps that you have that use data like weather, certain widgets, etc. i have a weather widget that updates every 2 hours and a word of the day widget and that's all that really uses my data throughout the day unless i open something myself. also dim the back light to the dullest you can but bright enough that you're still happy with it. i think mine is just under halfway on the bar.
i've done this my last two phones and did it to my sisters phone and they last much longer. hers used to die halfway into the day lol. but then lasted about twice that afterwards
Like what "Backround tasks"? and is the audio on the phone quieter then a ipod? loll idk it seems like when i hook it up to my HU and turn it all the way up its still a little quiet? might just be my ears going out who knows loll