Clean out the fans with a can of compressed air. Keep the laptop on a flat surface and make sure all the vents aren't blocked. Try putting something under the corners of the laptop, like erasers or something, so that there is more clearance between the desk and the laptop. If it's still too hot get like one of those "laptop cooling pads" or whatever they're called. Its like a board with fans in it that you put under the laptop. You can usually find it one at a computer store, they cost around $30.
