The best means against overheating is to get low power eqipment and more space to distribute the heat.
The Thinkpad 600 Series is really nice, if you do not need the last bit of Portability and a little bit more power go with the A22p. I have yet to find a centrino Laptop, that can keep up concerning Display quality and mechanical stability.
I tried newer Thinkpads, but the A3x Series and the R series are significantly weaker, the T4x-series seem to have Problems with their Mainboards and have worse Displays.
Every Laptop, that I broke was "my fault", but I did not manage to break the A22p, and it had to endure quite a bit. I could not count how often it has fallen down from the cars passenger seat, the cars roof, the desk when you trip over the power cord (which is more throwing than falling), my bed,...
And the stability of the Display is something else: ever driven in a bus/car while using the laptop? And now imagine you did not need to lean your Display against the front seat because the hinges are stable...
Christian