Firstly make sure when your using the laptop not of the vents are being blocked. This can often happen when resting a laptop in your lap and your clothing blocks some of the ventilation causing very rapid heat build up.
Secondly, as mentioned above, get yourself a can of compressed air and attempt to clear out some of the dust.
Thirdly, after-market cooling options are available. These consist of flat platform with built in fans that you rest the laptop on and the blow cold air onto the base of your laptop keeping the whole unit cooler.
I used to have a laptop that ran at 92C while normal use then while video encoding shoot to 104C Only lasted 7 months, after that I bought a desktop. Why don't they make laptops with better cooling at so a lap does not obscure the vents...
Oh well, that question was for majorgibly, but anyway. You answer it and provide some info on the spec which is useful. Now it would be nice if you can download hwmonitor and get a reading on the temp.