OK I understand now. So I suppose over clocking it a little would be a bad idea as well?
Exactly! And as the laptop ages with the stock components, the heat transfer will deteriorate due to oxidization and dust buildup. This further adds to the heat problems in laptops.
When I use my laptop on a desk, I try and place risers under the tiny stand-off bumpers at the bottom of the laptop to effectively increase the space under the laptop for air flow and to help in cooling.