Well this is not a true desktop computer tip but is one of those great lists that we always like to read. By the way if the link does not open for you then hold down your ctrl key (you know the bottom left key on the keyboard.
I have recently switched to a laptop from a desktop and besides the ability to be untethered from a desk it has taken a bit of time for me to start using the laptop just on battery power…which I know do. One thing to make sure that you have is some kind of software to be able to see how much life is left in the battery. I use Battery Meter Plus which is a free application for Windows that shows a little bar on the side of your screen and as the battery starts to die it will get stronger on the screen and show you how much time you have left.