What can i do to make sure my battery lasts as long as it can?
Like, for example, charging it only when it completely dies, or charging it with my phone on,
stuff like that
Well of course if you charge it while the phone is on it wont die. Unless you are using it tons!
But They say that you should give your cell phone a break. And should turn it off for at least a couple of minutes a day.
But, Turning it on or off while charging will not make a difference. I turn mine off while im brushing my teeth before I go to bed. And then turn it back on and plug it in to charge it. That way I do not miss a call or text message!