I'm usually a minimalist, I just have what I need open. Although I tend to leave programs open longer than I need them on my desktop because that thing isn't going to slow down for nothing, however my laptop is a different story.
(Original post by Gofre)
My laptop can go a couple of weeks without being turned off if I don't go home for the weekend or have to spend the day in the library, even if it only gets used for a few hours a day =P
But why not turn it off when you're asleep?
I turn off my laptop whenever I'm not using it for 30mins or more, by the sounds of it you're wasting alot of electricity.