I understand that high electricity usage isn't free, or very environmental for that matter. I've read somewhere that it is fore some reason not good for electronic devices to be turned on and off all the time. I'd just like to know if its true or not.
Theoretically, its harder on the hardware to be turned on and off all the time, particularly for the hard drive. For the rest, each time its turned on, a fractionally small bit of the part gets burned off, so when enough bits get burned off, then the part fails.
So much for theory. A decade or more ago that might have been good advice, but now most parts are of good enough quality that they rarely burn out from being turned on or off. I turn mine off daily and clear the ram, etc of any corruptions that have worked themselves into programs.
The electricty saved probably amounts to a few dallars a month, but not many, as you can use hibernate or other power savers that turn most everything off but allows a quick restart when needed. In the end, when it comes to turning it off or leaving it on, I'd say do whichever you like and don't feel uncomfortable about it.