1) When you first get your Macbook Pro, should you let the battery die out completely and then fully charge it? Or should I charge it fully first? Or what? I don't want to mess up the battery with the first charge. 2) Do you leave your Macbook plugged in while you sleep, are not using it, etc? Or is that bad for the battery? 3) I've heard somewhere that it's bad to shut your Macbook off when you go out/go to sleep. Would it be wiser to just set it to "sleep" and keep it plugged in or something? Any tips/suggestions/advice are welcome. Thanks so much!