Hi, I just got a 2.0 Intel Core Duo Macbook, and I love it so far. I traded it for a 1.83 core duo iMac. One thing I was wondering was, should I be shutting down my laptop everynight? With my imac, it would be on for days without even resetting, and I never really shut it off. I'm ususually downloading something so it was usually on at night. (not sure if it's asleep while downloading, or just the screen is off) Is it okay to keep the macbook on for long periods of time?