Make sure you don't block the laptop's vents.
That's the main thing.
Some people use this on their lap.
Not a good idea, despite their name, laptops function better when placed on a smooth, solid surface.
Avoid blankets, towels or any fabrics, as they tend to block the air intake vents and cause it run hot.
I haven't had to use a laptop cooling surface, but if it bother you that much, there are some available for about ~$20 that might provide extra cooling.