The story,
People always ask me how to increase the lifespan of their PC or laptop. If they really want it to last very very long, I would suggest keep if off and don't use it ... just joking :-).
Amazingly, PC components nowadays are built to last even we never turn it off. In fact, some reports show that PC last longer without turning it off.
But there are things that we must consider, heat and vibration. If you don't want to turn off the PC/laptop, make sure it is in a cool place and not getting lots of vibration (Don't move or carry it around).
Here's a link to Cnet forum for more information.
