Originally posted by Ushgarak
That rather goes against the whole point of it all. You CANNOT use the Dark Side for selfless purposes; that is the point.
According to the AOTC novel, this is exactly what Yoda does. He somehow uses the dark side of the force to "probe" future for clues about why the dark side is growing more powerful. It is a dangerous task but Yoda is able to do it.
Although it is true that once a Jedi begins "using" the dark side of the force, it consumes them and their future. But somehow Yoda has enough self discipline to be able to do this under controlled circumstances.